Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 312021
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
321 PM CDT Tue Aug 31 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
321 PM CDT Tue Aug 31 2021 /421 PM EDT Tue Aug 31 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

High Swim Risk.

DISCUSSION...

Increasing onshore winds will build waves along Lake Michigan
beaches this evening, resulting in dangerous swimming
conditions.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
High Swim Risk.

DISCUSSION:

Dangerous swimming conditions are expected along all Illinois
and Indiana Lake Michigan beaches on Wednesday through Wednesday
night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 311601 AAA
HWOLOT

Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
1101 AM CDT Tue Aug 31 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1101 AM CDT Tue Aug 31 2021 /1201 PM EDT Tue Aug 31 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

High Swim Risk tonight.

DISCUSSION...

Increasing onshore winds will build waves along Lake Michigan
beaches this evening, resulting in dangerous swimming
conditions for Illinois and Lake County Indiana beaches.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
High Swim Risk.

DISCUSSION:

Dangerous swimming conditions are expected along all Illinois
and Indiana Lake Michigan beaches on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 310816
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
316 AM CDT Tue Aug 31 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
316 AM CDT Tue Aug 31 2021 /416 AM EDT Tue Aug 31 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

High Swim Risk tonight.

DISCUSSION...

Increasing onshore winds will build waves along Lake Michigan
beaches this evening, resulting in dangerous swimming
conditions for Illinois and Lake County Indiana beaches.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
High Swim Risk.

DISCUSSION:

Dangerous swimming conditions are expected along all Illinois
and Indiana Lake Michigan beaches on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 301953
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
253 PM CDT Mon Aug 30 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
253 PM CDT Mon Aug 30 2021 /353 PM EDT Mon Aug 30 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.

DISCUSSION...

There is a chance of thunderstorms south of a Pontiac to Watseka
to Remington line. No severe weather is expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Limited Morning Thunderstorm Risk South.
High Swim Risk at night.
Wednesday...
High Swim Risk.
Friday...
Limited Thunderstorm Risk.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 25 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 300833
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
333 AM CDT Mon Aug 30 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
333 AM CDT Mon Aug 30 2021 /433 AM EDT Mon Aug 30 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.

DISCUSSION...

There is a chance of thunderstorms south of a Pontiac to Watseka
to Remington line. No severe weather is expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday Night and Wednesday...
High Swim Risk.
Friday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 25 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 300114
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
814 PM CDT Sun Aug 29 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
814 PM CDT Sun Aug 29 2021 /914 PM EDT Sun Aug 29 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Friday.

Monday and Tuesday...
Limited Thunderstorm Risk, mainly well south of Interstate 80.
Wednesday...
High Swim Risk along all Lake Michigan Beaches.
Friday and Saturday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 292002
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
302 PM CDT Sun Aug 29 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
302 PM CDT Sun Aug 29 2021 /402 PM EDT Sun Aug 29 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms will continue through the evening, ending
from northwest to southeast. The strongest storms will produce
wind gusts strong enough to down small tree limbs as well as
frequent lightning. Widespread severe weather is unlikely.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday and Tuesday...
Limited Thunderstorm Risk.
Friday and Saturday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotters activation will not be needed today. However, any
reports of severe weather would be appreciated.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 25 mph.
</pre>


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Special Weather Statement for McHenry Co., IL

<pre>WWUS83 KLOT 291920
SPSLOT

Special Weather Statement
National Weather Service Chicago/Romeoville
220 PM CDT Sun Aug 29 2021


Lake IL-Kane IL-De Kalb IL-McHenry IL-DuPage IL-Northern Cook IL-
220 PM CDT Sun Aug 29 2021

...Strong thunderstorms will impact portions of southern Lake, east
central De Kalb, northern Kane, southeastern McHenry, northwestern
DuPage and northwestern Cook Counties through 300 PM CDT...

At 219 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Lincolnshire to Barrington Hills to near Maple
Park. Movement was east at 25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Elgin, Waukegan, Arlington Heights, Schaumburg, Palatine, Mount
Prospect, Hoffman Estates, Glenview, DeKalb, Buffalo Grove, Bartlett,
Streamwood, Hanover Park, Carpentersville, Wheeling, Northbrook, Elk
Grove Village, St. Charles, North Chicago and Mundelein.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4231 8782 4230 8783 4227 8783 4219 8779
4213 8775 4207 8793 4191 8829 4195 8875
4234 8804
TIME...MOT...LOC 1919Z 276DEG 19KT 4220 8792 4213 8821 4198 8858

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
</pre>


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Special Weather Statement for McHenry Co., IL

<pre>WWUS83 KLOT 291840
SPSLOT

Special Weather Statement
National Weather Service Chicago/Romeoville
140 PM CDT Sun Aug 29 2021


Lake IL-McHenry IL-
140 PM CDT Sun Aug 29 2021

...Strong thunderstorms will impact portions of Lake and southeastern
McHenry Counties through 215 PM CDT...

At 140 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Winthrop Harbor to Gages Lake to Lake in the
Hills. Movement was east at 40 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Waukegan, Buffalo Grove, Crystal Lake, North Chicago, Gurnee,
Mundelein, Algonquin, Highland Park, Lake in the Hills, Round Lake
Beach, McHenry, Vernon Hills, Zion, Huntley, Grayslake, Libertyville,
Lake Zurich, Lake Forest, Round Lake and Antioch.

Including the following interstates...
I-94 between mile markers 1 and 24.
I-294 between mile markers 1 and 24.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4249 8780 4238 8781 4236 8782 4237 8782
4233 8783 4233 8782 4231 8782 4230 8783
4229 8783 4221 8780 4216 8776 4216 8849
4237 8821 4250 8819
TIME...MOT...LOC 1840Z 266DEG 33KT 4250 8783 4233 8800 4219 8834

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
</pre>


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Special Weather Statement for McHenry Co., IL

<pre>WWUS83 KLOT 291805
SPSLOT

Special Weather Statement
National Weather Service Chicago/Romeoville
105 PM CDT Sun Aug 29 2021


Lake IL-McHenry IL-
105 PM CDT Sun Aug 29 2021

...Strong thunderstorms will impact portions of northwestern Lake and
McHenry Counties through 145 PM CDT...

At 105 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Silver Lake to Wonder Lake to near
Marengo. Movement was east at 35 mph.

HAZARD...Winds of 45 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Crystal Lake, Lake in the Hills, Round Lake Beach, McHenry,
Woodstock, Huntley, Round Lake, Antioch, Fox Lake, Lake Villa, Island
Lake, Marengo, Lindenhurst, Johnsburg, Lakemoor, Spring Grove, Wonder
Lake, Wadsworth, Lakewood and Long Lake.

This includes... Chain O Lakes State Park, Mchenry County College,
Mchenry County Fairgrounds, and Moraine Hills State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4249 8794 4220 8833 4221 8870 4233 8869
4250 8843
TIME...MOT...LOC 1805Z 255DEG 30KT 4258 8816 4239 8836 4227 8854

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 291718
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1218 PM CDT Sun Aug 29 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1218 PM CDT Sun Aug 29 2021 /118 PM EDT Sun Aug 29 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms are expected this afternoon into this
evening. Some of these thunderstorms may become severe with
damaging wind gusts the main severe weather threat. Heavy rain
will also be possible, which may cause localized flooding.

The storm coverage will increase in the Chicago area after 2 to
3 pm CDT, with highest coverage mid afternoon through early evening.

Heat index readings will reach near 100 degrees today.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
High Swim Risk.
Wednesday...
High Swim Risk.
Friday and Saturday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this afternoon into this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east northeast at around 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 290851
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
351 AM CDT Sun Aug 29 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
351 AM CDT Sun Aug 29 2021 /451 AM EDT Sun Aug 29 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited hail risk...up to quarter size.
Limited damaging wind risk...up to 60 mph.
Limited Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms are expected this afternoon into this
evening. Some of these thunderstorms may become severe with
damaging wind gusts the main severe weather threat. Heavy rain
will also be possible, which may cause localized flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
High Swim Risk Tuesday Night.
Wednesday...
High Swim Risk.
Friday and Saturday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this afternoon into this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east or southeast at 35 mph.
</pre>


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Areal Flood Advisory Expiration for McHenry Co., IL

<pre>WGUS83 KLOT 290021
FLSLOT

Flood Advisory
National Weather Service Chicago IL
721 PM CDT Sat Aug 28 2021


/O.EXP.KLOT.FA.Y.0041.000000T0000Z-210829T0030Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-McHenry IL-
721 PM CDT Sat Aug 28 2021

...FLOOD ADVISORY WILL EXPIRE AT 730 PM CDT THIS EVENING FOR
NORTHEASTERN BOONE AND NORTHWESTERN MCHENRY COUNTIES...

Flooding is no longer expected to pose a threat.

LAT...LON 4249 8871 4249 8866 4250 8863 4250 8858
4250 8857 4249 8855 4240 8871 4235 8879
4242 8888 4249 8876 4249 8874
</pre>


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Areal Flood Advisory for McHenry Co., IL until 07:30 PM CDT 8/28

<pre>WGUS83 KLOT 282338
FLSLOT

Flood Advisory
National Weather Service Chicago IL
638 PM CDT Sat Aug 28 2021


/O.CON.KLOT.FA.Y.0041.000000T0000Z-210829T0030Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-McHenry IL-
638 PM CDT Sat Aug 28 2021

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 730 PM CDT THIS EVENING
FOR NORTHEASTERN BOONE AND NORTHWESTERN MCHENRY COUNTIES...

At 638 PM CDT, doppler radar indicated rain was ending across the
Advisory area. Between 2 and 4 inches of rain have fallen this
afternoon, likely leading to nuisance flooding of ditches and farm
fields. Waters will recede and soak into the ground over the next
hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4249 8871 4249 8866 4250 8863 4250 8858
4250 8857 4249 8855 4240 8871 4235 8879
4242 8888 4249 8876 4249 8874
</pre>


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Areal Flood Advisory for McHenry Co., IL until 07:30 PM CDT 8/28

<pre>WGUS83 KLOT 282226
FLSLOT

Flood Advisory
National Weather Service Chicago IL
526 PM CDT Sat Aug 28 2021


/O.NEW.KLOT.FA.Y.0041.210828T2226Z-210829T0030Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-McHenry IL-
526 PM CDT Sat Aug 28 2021

The National Weather Service in Chicago has issued a

* Flood Advisory for...
Northeastern Boone County in north central Illinois...
Northwestern McHenry County in northeastern Illinois...

* Until 730 PM CDT.

* At 526 PM CDT, doppler radar indicated heavy rain due to
thunderstorms. Between 1 and 3 inches of rain have fallen, and an
additional inch of rain may occur over the next hour as
thunderstorms redevelop over the same area. Flooding of fields and
low-lying roadways is expected to occur.

* Some locations that will experience flooding include...
Harvard, Poplar Grove and Capron.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4249 8871 4249 8866 4250 8863 4250 8858
4250 8857 4249 8855 4240 8871 4235 8879
4242 8888 4249 8876 4249 8874
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 282031
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
331 PM CDT Sat Aug 28 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
331 PM CDT Sat Aug 28 2021 /431 PM EDT Sat Aug 28 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Isolated thunderstorms will continue through sunset. Severe weather
is not anticipated, but torrential downpours and localized strong
wind gusts will be possible with these storms.

Heat index values are expected to remain around 100 into early
evening.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Afternoon Severe Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
Monday...
Elevated Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.

DISCUSSION:

Scattered thunderstorms are possible Sunday afternoon into
Sunday evening. A few of these storms may be severe, especially
across northeast Illinois and northwest Indiana. Locally heavy
rainfall will also be possible with these storms and this could
cause isolated instances of flooding.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east northeast at 10 to 15 mph.
</pre>


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Special Weather Statement for McHenry Co., IL

<pre>WWUS83 KLOT 282031
SPSLOT

SPECIAL WEATHER STATEMENT
National Weather Service Chicago/Romeoville IL
331 PM CDT Sat Aug 28 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Northern Cook-Central Cook-
Southern Cook-Northern Will-Southern Will-Eastern Will-Lake IN-
Porter-
Including the cities of Rockford, Belvidere, Crystal Lake,
Algonquin, McHenry, Woodstock, Waukegan, Buffalo Grove,
Mundelein, Gurnee, Rochelle, Oregon, Byron, Dixon, DeKalb,
Sycamore, Aurora, Elgin, Naperville, Wheaton, Downers Grove,
Lombard, Carol Stream, Ottawa, Streator, La Salle, Mendota,
Marseilles, Oswego, Yorkville, Plano, Morris, Coal City, Minooka,
Kankakee, Bourbonnais, Bradley, Evanston, Des Plaines,
Schaumburg, Palatine, Northbrook, Chicago, Cicero, Oak Lawn,
Oak Park, La Grange, Calumet City, Oak Forest, Lemont,
Orland Park, Park Forest, Joliet, Bolingbrook, Plainfield,
Mokena, Channahon, Manhattan, Wilmington, Crete, Peotone,
Beecher, Gary, Hammond, Merrillville, Portage, Valparaiso,
and Chesterton
331 PM CDT Sat Aug 28 2021

...THUNDERSTORMS WITH GUSTY WINDS THIS AFTERNOON...

Widely scattered thunderstorms will continue developing across
northern Illinois and northwestern Indiana this afternoon. The
strongest thunderstorms will produce torrential downpours,
frequent lightning, and gusty winds strong enough to down small
tree limbs and tented structures. Many areas will stay dry,
however. Keep an eye to the sky, and move indoors if you hear
thunder.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 281515
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1015 AM CDT Sat Aug 28 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1015 AM CDT Sat Aug 28 2021 /1115 AM EDT Sat Aug 28 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Isolated thunderstorms are possible this afternoon, mainly
east of Interstate 57. No severe weather is expected.

Peak heat index values are expected to reach 100 to 103 degrees
this afternoon.


.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.

DISCUSSION:

Scattered thunderstorms are possible Sunday afternoon into
Sunday evening. A few of these storms may be severe, especially
across northeast Illinois and northwest Indiana.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 15 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 280834
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
334 AM CDT Sat Aug 28 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
334 AM CDT Sat Aug 28 2021 /434 AM EDT Sat Aug 28 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Isolated thunderstorms are possible this afternoon, mainly
east of Interstate 57. No severe weather is expected.

Peak heat index values are expected to reach 100 to 103 degrees
this afternoon.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
Limited Severe Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.
Friday...
Limited Thunderstorm Risk.

DISCUSSION:

Scattered thunderstorms are possible Sunday afternoon into
Sunday evening. A few of these storms may be severe, especially
across northeast Illinois and northwest Indiana.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 15 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 272036
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
336 PM CDT Fri Aug 27 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
336 PM CDT Fri Aug 27 2021 /436 PM EDT Fri Aug 27 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Isolated to widely scattered thunderstorms are possible this afternoon and
southeast of a Pontiac to Kankakee to Michigan City line through early
evening, with a slight chance across far northern Illinois overnight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk.
Elevated Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Tuesday...
Limited Thunderstorm Risk.
High Swim Risk.
Wednesday...
High Swim Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not likely needed through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the northeast at 10 to 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 271559
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1059 AM CDT Fri Aug 27 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1059 AM CDT Fri Aug 27 2021 /1159 AM EDT Fri Aug 27 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

An isolated thunderstorm is possible this afternoon and mainly
across far northern Illinois tonight.

Peak heat index values are expected to reach 100 to 103 degrees
this afternoon.


.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 10 to 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 270832
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
332 AM CDT Fri Aug 27 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
332 AM CDT Fri Aug 27 2021 /432 AM EDT Fri Aug 27 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Isolated thunderstorms are possible across the entire area
today and mainly across far northern Illinois tonight. A few
thunderstorms may be strong this afternoon and this evening.

Peak heat index values are expected to reach 100 to 103 degrees
this afternoon.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 270310
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1010 PM CDT Thu Aug 26 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1010 PM CDT Thu Aug 26 2021 /1110 PM EDT Thu Aug 26 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk after midnight for mainly
north central Illinois...with an associated:
Limited hail risk...up to the size of quarters.
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.


DISCUSSION...

Isolated to widely scattered thunderstorms may move into north
central Illinois late this evening. Severe weather is not expected
with these storms.

Additional thunderstorms may develop east or southeastward from
southern Minnesota and northern Iowa toward morning, which may
have a risk for isolated wind gusts strong enough to down tree
limbs. In addition, heavy downpours could cause localized
flooding.

.DAYS TWO THROUGH SEVEN...Friday through Tuesday.

Friday...
Limited Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Elevated Thunderstorm Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are possible each day of the period, but appear
most likely late Sunday and least likely on Saturday. Early next
week the focus shifts to southern portions of the forecast area.
Hot and humid conditions will continue with peak heat indices near
100 to 105 degrees on Friday and Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward Moving toward the east at 20 to 30 mph after
midnight tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 262042
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
342 PM CDT Thu Aug 26 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
342 PM CDT Thu Aug 26 2021 /442 PM EDT Thu Aug 26 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk early this evening.

DISCUSSION...

Isolated to widely scattered thunderstorms are possible into early
this evening, with locally strong wind gusts strong enough to down
small tree limbs. Slow movement may result in locally heavy
rainfall and flooding. Additional thunderstorms may push east out
of Iowa later this evening, bringing a risk for wind gusts strong
enough to down tree limbs to the region. In addition, heavy
downpours could cause localized flooding.


.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk Late.
Limited Excessive Heat Risk.
Monday...
Elevated Thunderstorm Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are possible each day of the period, but appear
most likely late Sunday and least likely on Saturday. Early next
week the focus shifts to southern portions of the forecast area.
Hot and humid conditions will continue with peak heat indices near
100 to 105 degrees on Friday and Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening and tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-northeast at 15 mph through early evening.
Moving toward the east at 20 to 30 mph late this evening and overnight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 261714
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1214 PM CDT Thu Aug 26 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1214 PM CDT Thu Aug 26 2021 /114 PM EDT Thu Aug 26 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Scattered mainly non-severe thunderstorms are possible this
afternoon, with locally strong wind gusts strong enough to down
small tree limbs. Slow movement may result in locally heavy
rainfall and flooding. Additional thunderstorms may push east out
of Iowa later this evening, bringing a risk for wind gusts strong
enough to down tree limbs to the region. In addition, heavy
downpours could cause localized flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...
Limited Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Saturday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday through Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are possible each day of the period, but appear
most likely on Sunday and least likely on Saturday. Early next
week the focus shifts to southern portions of the forecast area.
Hot and humid conditions will continue with peak heat indices near
100 to 105 degrees on Friday and Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening and tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-northeast at 15 mph this afternoon.
Moving toward the southeast at 30 mph this evening.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 260924
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
424 AM CDT Thu Aug 26 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
424 AM CDT Thu Aug 26 2021 /524 AM EDT Thu Aug 26 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Limited Excessive Heat Risk.
Limited Fog Risk this morning.

DISCUSSION...

Pockets of dense fog will be possible until 8 AM north and west of
I-57. Peak heat indices near 100 degrees are expected today, mainly
for locales south of I-80.

Scattered showers and non-severe thunderstorms are possible this
morning and afternoon. Slow movement may result in additional
locally heavy rainfal. Additional thunderstorms may push east out
of Iowa later this evening, bringing a risk for wind gusts strong
enough to down tree limbs to the region.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday and Saturday...
Limited Thunderstorm Risk.
Limited to Elevated Excessive Heat Risk.
Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday through Wednesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are possible each day of the period, but appear
most likely on Sunday and least likely on Saturday. Early next
week the focus shifts to southern portions of the forecast area.
Hot and humid conditions will continue with peak heat indices near
100 to 105 degrees on Friday and Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east-northeast at 15 mph this morning and
afternoon. Moving toward the southeast at 30 mph this evening.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 252046
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 PM CDT Wed Aug 25 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
346 PM CDT Wed Aug 25 2021 /446 PM EDT Wed Aug 25 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Limited Fog Risk.

DISCUSSION...

Scattered thunderstorms are probable this evening. A few storms
could become strong to marginally severe with winds strong
enough to down tree limbs. In addition, torrential rainfall with
the strongest storms could lead to some isolated instances of
flooding.

Peak heat indices early this evening of up to 105 to 109 degrees
are expected for areas along and south of I-80 where a Heat
Advisory remains in effect through 7 PM CDT.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Limited Fog Risk.
Friday and Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Sunday...
Elevated Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms are expected each day of the period, but appear
most widespread on Sunday and least widespread on Saturday.
Early next week the focus shifts to southern portions of the
forecast area.

.SPOTTER INFORMATION STATEMENT...

Spotters are encourage to report any damage they might observe
this evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east and southeast at 20 to 25 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 251818
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
118 PM CDT Wed Aug 25 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
118 PM CDT Wed Aug 25 2021 /218 PM EDT Wed Aug 25 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Scattered thunderstorms are probable from the mid to late
afternoon into the evening evening. A few storms could become
strong to marginally severe with winds strong enough to down tree
limbs. In addition, torrential rainfall with the strongest storms
could lead to some isolated instances of flooding.

Peak heat indices this afternoon of up to 105 to 109 degrees are
expected for areas along and south of I-80 where a Heat Advisory
is in effect.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Friday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.

DISCUSSION:

Periodic thunderstorms will occur through the weekend, though many
hours will stay dry. Storms on Thursday and Thursday night may
continue to pose a threat for strong wind gusts.

.SPOTTER INFORMATION STATEMENT...

Given the limited nature of any severe threat today, spotters
are not currently expected to be needed, although timely reports
of damage are appreciated.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 250858
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
358 AM CDT Wed Aug 25 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
358 AM CDT Wed Aug 25 2021 /458 AM EDT Wed Aug 25 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited Flooding Risk.
Elevated Excessive Heat Risk south of I-80.

DISCUSSION...
Showers and perhaps a few non-severe storms are possible this
morning, mainly near and north of I-80.

Additional scattered thunderstorms are then possible this
afternoon and evening. A few storms could become strong to
marginally severe with winds strong enough to down tree limbs. In
addition, torrential rainfall with the strongest storms could lead
to some isolated instances of flooding.

Peak heat indices this afternoon of 104 to 108 degrees are
expected for areas along and south of I-80 where a Heat Advisory
is in effect.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday and Tuesday...
Limited Thunderstorm Risk.

DISCUSSION:

Periodic thunderstorms will occur through the weekend, though many
hours will stay dry. Storms on Thursday and Thursday night may
continue to pose a threat for strong wind gusts.

.SPOTTER INFORMATION STATEMENT...

Given the limited nature of any severe threat today, spotters
are not currently expected to be needed, although timely reports
of damage are appreciated.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 20 mph.
</pre>


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Flash Flood Warning Expiration for McHenry Co., IL

<pre>WGUS73 KLOT 250242
FFSLOT

Flash Flood Statement
National Weather Service Chicago IL
942 PM CDT Tue Aug 24 2021


/O.EXP.KLOT.FF.W.0007.000000T0000Z-210825T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-McHenry IL-
942 PM CDT Tue Aug 24 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM CDT THIS EVENING FOR
NORTHEASTERN BOONE AND NORTHWESTERN MCHENRY COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.

LAT...LON 4236 8881 4244 8877 4249 8872 4249 8836
4237 8851 4233 8871
</pre>


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Severe Thunderstorm Watch Cancellation for McHenry Co., IL

<pre>WWUS63 KLOT 250037
WCNLOT

WATCH COUNTY NOTIFICATION FOR WATCH 462
NATIONAL WEATHER SERVICE CHICAGO IL
737 PM CDT TUE AUG 24 2021


/O.CAN.KLOT.SV.A.0462.000000T0000Z-210825T0400Z/

THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM
WATCH 462 FOR THE FOLLOWING AREAS

IN ILLINOIS THIS CANCELS 7 COUNTIES

IN NORTH CENTRAL ILLINOIS

BOONE DE KALB LEE
OGLE WINNEBAGO

IN NORTHEAST ILLINOIS

KANE MCHENRY

THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BYRON,
CRYSTAL LAKE, DEKALB, DIXON, ELGIN, MCHENRY, OREGON, ROCHELLE,
ROCKFORD, SYCAMORE, AND WOODSTOCK.
</pre>


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Areal Flood Advisory Cancellation for McHenry Co., IL

<pre>WGUS83 KLOT 250034
FLSLOT

Flood Advisory
National Weather Service Chicago IL
734 PM CDT Tue Aug 24 2021


/O.CAN.KLOT.FA.Y.0032.000000T0000Z-210825T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-Lake IL IL-McHenry IL-
734 PM CDT Tue Aug 24 2021

...FLOOD ADVISORY IS REPLACED BY A FLASH FLOOD WARNING AND NEW FLOOD
ADVISORY IN NORTHERN BOONE, WESTERN LAKE IL, AND NORTHERN MCHENRY
COUNTIES...

Portions of this advisory have been replaced by a Flash Flood
Warning or a larger Flood Advisory. The threat for flooding
continues across portions of the area.

LAT...LON 4240 8890 4249 8882 4250 8820 4232 8820
4226 8886
</pre>


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Areal Flood Advisory for McHenry Co., IL until 10:30 PM CDT 8/24

<pre>WGUS83 KLOT 250031
FLSLOT

Flood Advisory
National Weather Service Chicago IL
731 PM CDT Tue Aug 24 2021


/O.NEW.KLOT.FA.Y.0034.210825T0031Z-210825T0330Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-Lake IL IL-McHenry IL-
731 PM CDT Tue Aug 24 2021

The National Weather Service in Chicago has issued a

* Flood Advisory for...
Northern Boone County in north central Illinois...
Northern Lake IL County in northeastern Illinois...
Northern McHenry County in northeastern Illinois...

* Until 1030 PM CDT.

* At 731 PM CDT, doppler radar and automated rain gauges indicated
heavy rain due to thunderstorms. Between 1.5 and 2 inches of rain
have fallen. Heavy rainfall has ended in Boone and McHenry County
with light rainfall continuing. Heavier rainfall is currently
moving into Lake County where earlier storms produced heavy
rainfall.

This advisory replaces the flood advisory previously issued for
portions of Boone, McHenry, and Lake Counties.

A Flash Flood Warning remains in effect for northeastern Boone and
northwestern McHenry counties where heavier rainfall has occurred.

* Some locations that will experience flooding include...
Waukegan, North Chicago, Gurnee, Round Lake Beach, McHenry,
Belvidere, Woodstock, Zion, Grayslake, Round Lake, Antioch, Fox
Lake, Harvard, Lake Villa, Poplar Grove, Lindenhurst, Beach Park,
Gages Lake, Park City and Round Lake Park.

Additional rainfall of 1 inch is expected over the area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4250 8812 4249 8781 4248 8780 4248 8776
4235 8778 4226 8886 4240 8890 4249 8882
</pre>


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Flash Flood Warning for McHenry Co., IL until 09:45 PM CDT 8/24

<pre>WGUS73 KLOT 250024
FFSLOT

Flash Flood Statement
National Weather Service Chicago IL
724 PM CDT Tue Aug 24 2021


/O.CON.KLOT.FF.W.0007.000000T0000Z-210825T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-McHenry IL-
724 PM CDT Tue Aug 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CDT THIS
EVENING FOR NORTHEASTERN BOONE AND NORTHWESTERN MCHENRY COUNTIES...

At 724 PM CDT, doppler radar and automated rain gauges indicated
thunderstorms had produced heavy rain across the warned area.
Between 2 and 5 inches of rain have fallen. Although the heaviest
rainfall had moved east out of the area, light rainfall may
continue, with additional rainfall amounts up to 0.5 inches possible.

HAZARD...Flash flooding.

SOURCE...Radar and automated gauges.

IMPACT...Rapid-onset flooding of small creeks and streams, urban
areas, highways, streets and underpasses, as well as
other poor drainage and low lying areas.

Some locations that will experience flash flooding include...
Harvard, Capron, Hebron and Chemung.

The heaviest rainfall has occurred in the headwaters of Piscasaw
Creek north of Chemung and Harvard. A rapid rise in water levels
along Piscasaw Creek and nearby waterways is imminent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means rapid-onset flooding is imminent or may
already be occurring. Persons along creeks, drainage ditches, and
other waterways should take immediate precautions to protect life
and property.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 4236 8881 4244 8877 4249 8872 4249 8836
4237 8851 4233 8871

FLASH FLOOD...RADAR AND GAUGE INDICATED
</pre>


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Severe Thunderstorm Watch for McHenry Co., IL until 11:00 PM CDT 8/24

<pre>WWUS63 KLOT 242336
WCNLOT

WATCH COUNTY NOTIFICATION FOR WATCH 462
NATIONAL WEATHER SERVICE CHICAGO IL
636 PM CDT TUE AUG 24 2021



/O.CON.KLOT.SV.A.0462.000000T0000Z-210825T0400Z/

SEVERE THUNDERSTORM WATCH 462 REMAINS VALID UNTIL 11 PM CDT THIS
EVENING FOR THE FOLLOWING AREAS

IN ILLINOIS THIS WATCH INCLUDES 7 COUNTIES

IN NORTH CENTRAL ILLINOIS

BOONE DE KALB LEE
OGLE WINNEBAGO

IN NORTHEAST ILLINOIS

KANE MCHENRY

THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BYRON,
CRYSTAL LAKE, DEKALB, DIXON, ELGIN, MCHENRY, OREGON, ROCHELLE,
ROCKFORD, SYCAMORE, AND WOODSTOCK.
</pre>


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Severe Weather Statement for McHenry Co., IL

<pre>WWUS53 KLOT 242333
SVSLOT

Severe Weather Statement
National Weather Service Chicago/Romeoville
633 PM CDT Tue Aug 24 2021

/O.CON.KLOT.SV.W.0090.000000T0000Z-210825T0015Z/
Lee IL-Ogle IL-De Kalb IL-Kane IL-McHenry IL-Boone IL-
633 PM CDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR EASTERN LEE...SOUTHEASTERN OGLE...DE KALB...KANE...MCHENRY AND
BOONE COUNTIES...

At 632 PM CDT, severe thunderstorms were located along a line
extending from near Sharon to near Kingston to near Waterman to near
Paw Paw, moving east at 50 mph. This line of storms has a history of
producing winds in excess of 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Elgin, DeKalb, Crystal Lake, Carpentersville, St. Charles, Algonquin,
Lake in the Hills, McHenry, Belvidere, Woodstock, Huntley, Geneva,
Sycamore, Campton Hills, Fox Lake, Rochelle, Harvard, Island Lake,
Marengo and Sandwich.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4215 8820 4215 8824 4209 8824 4178 8842
4172 8849 4172 8860 4163 8860 4163 8917
4158 8917 4159 8943 4215 8894 4249 8877
4249 8820
TIME...MOT...LOC 2332Z 268DEG 45KT 4245 8873 4205 8875 4184 8880 4165
8907

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
</pre>


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Severe Thunderstorm Warning for McHenry Co., IL until 07:15 PM CDT 8/24

<pre>WUUS53 KLOT 242309
SVRLOT
/O.NEW.KLOT.SV.W.0090.210824T2309Z-210825T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
609 PM CDT Tue Aug 24 2021

The National Weather Service in Chicago has issued a

* Severe Thunderstorm Warning for...
Eastern Lee County in north central Illinois...
Southeastern Ogle County in north central Illinois...
De Kalb County in north central Illinois...
Kane County in northeastern Illinois...
McHenry County in northeastern Illinois...
Boone County in north central Illinois...

* Until 715 PM CDT.

* At 608 PM CDT, severe thunderstorms were located along a line
extending from Rockton to near Davis Junction to 8 miles northeast
of Walnut, moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
Elgin, DeKalb, Crystal Lake, Carpentersville, St. Charles,
Algonquin, Lake in the Hills, McHenry, Belvidere, Woodstock,
Huntley, Geneva, Sycamore, Campton Hills, Fox Lake, Rochelle,
Harvard, Island Lake, Marengo and Sandwich.

Including the following interstates...
I-39 between mile markers 78 and 108.
I-88 between mile markers 70 and 112.
I-90 between mile markers 22 and 56.

This includes... Northern Illinois University, Sandwich Fairgrounds,
Boone County Fairgrounds, Elgin Community College, Mchenry County
College, Mchenry County Fairgrounds, Moraine Hills State Park, and
Waubonsee Community College.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4215 8820 4215 8824 4209 8824 4178 8842
4172 8849 4172 8860 4163 8860 4163 8917
4158 8917 4159 8943 4215 8894 4249 8877
4249 8820
TIME...MOT...LOC 2308Z 267DEG 48KT 4242 8908 4203 8909 4166 8950

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 242214
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
514 PM CDT Tue Aug 24 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
514 PM CDT Tue Aug 24 2021 /614 PM EDT Tue Aug 24 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited hail risk...up to quarter size.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Thunderstorms stretching from northeast Iowa, across northwest
Illinois and into southwest Wisconsin will continue into the
evening across northern Illinois. The main threat would be wind
gusts strong enough to down tree limbs if these storms do affect
the area and remain strong to severe. Higher confidence in
damaging winds is north of I-88 and west of the Chicago metro.
Additional thunderstorms are possible in the late evening and
overnight. Any thunderstorm through tonight will produce
torrential downpours capable of producing ponding on roadways and
possibly localized flooding.

Hot and humid conditions with heat index values of 100 to 110
degrees will continue south of Interstate 90 ahead of southward
moving front through early evening.


.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible area wide. The highest confidence
for heat indices in excess of 105 is along and south of Interstate 80
on Wednesday.

Periodic thunderstorms will occur through the weekend, though many
hours will stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed in the evening, mainly north of I-88 and
west of the Chicago area.

GENERAL STORM MOTION OF THE DAY:

Storms near the lake moving east northeast at 20 to 25 mph. Storms
in northwest Illinois moving toward east and east-southeast
30 to 40 mph.
</pre>


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Areal Flood Advisory for McHenry Co., IL until 08:00 PM CDT 8/24

<pre>WGUS83 KLOT 242158
FLSLOT

Flood Advisory
National Weather Service Chicago IL
458 PM CDT Tue Aug 24 2021


/O.NEW.KLOT.FA.Y.0032.210824T2158Z-210825T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-Lake IL IL-McHenry IL-
458 PM CDT Tue Aug 24 2021

The National Weather Service in Chicago has issued a

* Flood Advisory for...
Northern Boone County in north central Illinois...
Western Lake IL County in northeastern Illinois...
Northern McHenry County in northeastern Illinois...

* Until 800 PM CDT.

* At 458 PM CDT, doppler radar indicated heavy rain due to
thunderstorms. Between 1 and 2 inches of rain have fallen.

* Some locations that will experience flooding include...
McHenry, Belvidere, Woodstock, Fox Lake, Harvard, Poplar Grove,
Johnsburg, Lakemoor, Spring Grove, Candlewick Lake, Wonder Lake,
Pistakee Highlands, Richmond, Capron, Hebron, Bull Valley,
McCullom Lake, Timberlane, Ringwood and Chemung.

Additional rainfall of 1 to 2 inches is expected over the area. This
additional rain will result in minor flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Advisory means minor flooding along waterways and other poor
drainage areas is imminent or may already be occurring. Persons in
the advisory area should use caution and avoid flood waters.

&&

LAT...LON 4240 8890 4249 8882 4250 8820 4232 8820
4226 8886
</pre>


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Special Weather Statement for McHenry Co., IL

<pre>WWUS83 KLOT 242121
SPSLOT

Special Weather Statement
National Weather Service Chicago/Romeoville
421 PM CDT Tue Aug 24 2021


Boone IL-McHenry IL-
421 PM CDT Tue Aug 24 2021

...A strong thunderstorm will impact portions of northwestern McHenry
and northeastern Boone Counties through 445 PM CDT...

At 421 PM CDT, Doppler radar was tracking a strong thunderstorm near
Capron, or near Harvard, moving northeast at 15 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.

Locations impacted include...
Harvard, Capron and Chemung.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central and northeastern Illinois.

&&

LAT...LON 4239 8857 4234 8873 4246 8882 4249 8876
4249 8857
TIME...MOT...LOC 2121Z 243DEG 14KT 4242 8869

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
</pre>


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Severe Thunderstorm Watch for McHenry Co., IL until 11:00 PM CDT 8/24

<pre>WWUS63 KLOT 242059
WCNLOT

WATCH COUNTY NOTIFICATION FOR WATCH 462
NATIONAL WEATHER SERVICE CHICAGO IL
359 PM CDT TUE AUG 24 2021


/O.NEW.KLOT.SV.A.0462.210824T2059Z-210825T0400Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
462 IN EFFECT UNTIL 11 PM CDT THIS EVENING FOR THE FOLLOWING
AREAS

IN ILLINOIS THIS WATCH INCLUDES 7 COUNTIES

IN NORTH CENTRAL ILLINOIS

BOONE DE KALB LEE
OGLE WINNEBAGO

IN NORTHEAST ILLINOIS

KANE MCHENRY

THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BYRON,
CRYSTAL LAKE, DEKALB, DIXON, ELGIN, MCHENRY, OREGON, ROCHELLE,
ROCKFORD, SYCAMORE, AND WOODSTOCK.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 241736
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1236 PM CDT Tue Aug 24 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1236 PM CDT Tue Aug 24 2021 /136 PM EDT Tue Aug 24 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 60 mph.
Limited hail risk...up to quarter size.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Thunderstorms stretching from northern Iowa to central Wisconsin
as of mid day may move into areas mainly north of I-88 toward and
after sunset this evening. The main threat would be wind gusts
strong enough to down tree limbs if these storms do affect the
area and remain strong to severe. Additional thunderstorms are
possible in the late evening and overnight. Any thunderstorm
through tonight will produce torrential downpours capable of
producing ponding on roadways and possibly localized flooding.

Hot and humid conditions with heat index values of 100 to 110
degrees will continue through the afternoon.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible. Periodic thunderstorms will
occur as well, though many hours will stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed in the evening, mainly north of I-80.

GENERAL STORM MOTION OF THE DAY:

Moving toward east and east-southeast at 30 to 35 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 241310
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
810 AM CDT Tue Aug 24 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
810 AM CDT Tue Aug 24 2021 /910 AM EDT Tue Aug 24 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Elevated Thunderstorm Risk...with an associated:
Limited damaging wind risk...up to 65 mph.
Limited hail risk...up to the size of quarters.
Limited Flooding Risk.
Elevated Excessive Heat Risk.

DISCUSSION...

Showers and thunderstorms are possible later this morning and
into the afternoon. Winds strong enough to down tree limbs and
hail to the size of quarters will be possible, mainly for locales
north of I-80. Afternoon heat indices are expected to exceed 105
degrees for parts of north-central Illinois and northwest Indiana
where a Heat Advisory is in effect.

Additional rounds of showers and storms are possible this evening
and into Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible. Periodic thunderstorms will
occur as well, though many hours will stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed, mainly north of I-80.

GENERAL STORM MOTION OF THE DAY:

Moving toward east-southeast at 30 to 35 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 241004
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
504 AM CDT Tue Aug 24 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
504 AM CDT Tue Aug 24 2021 /604 AM EDT Tue Aug 24 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Elevated Excessive Heat Risk.
Limited Thunderstorm Risk...with an associated:
Limited hail risk...up to the size of quarters.
Limited damaging wind risk...up to 65 mph.
Limited Flooding Risk.

DISCUSSION...
A few isolated storms are possible early this morning, mainly
across parts of northwest Indiana.

Showers and thunderstorms are possible later this morning and
into the afternoon. Winds strong enough to down tree limbs and
hail to the size of quarters will be possible, mainly for locales
north of I-80. Afternoon heat indices are expected to exceed 105
degrees for parts of north-central Illinois and northwest Indiana
where a Heat Advisory is in effect.

Additional rounds of showers and storms are possible this evening
and into Wednesday.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible. Periodic thunderstorms will
occur as well, though many hours will stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed, mainly north of I-80.

GENERAL STORM MOTION OF THE DAY:

Moving toward the southeast at 35 to 40 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 232047
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
347 PM CDT Mon Aug 23 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
347 PM CDT Mon Aug 23 2021 /447 PM EDT Mon Aug 23 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.

DISCUSSION...

A few isolated thunderstorms remain possible early this evening
near and west of I-39. Additional thunderstorms may develop over
the area overnight, posing a threat for gusty winds. Heavy
downpours may cause ponding on some roads.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
Limited Severe Thunderstorm Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Saturday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
Sunday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible Tuesday and Wednesday.
Periodic thunderstorms will occur as well, though many hours will
stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east and southeast at 10 to 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 231653
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1153 AM CDT Mon Aug 23 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1153 AM CDT Mon Aug 23 2021 /1253 PM EDT Mon Aug 23 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

Limited Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.

DISCUSSION...

A few isolated thunderstorms are possible this afternoon near and
west of I-39. Additional thunderstorms may develop over the area
overnight, posing a threat for gusty winds. Heavy downpours may
cause ponding on some roads.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday and Wednesday...
Limited Thunderstorm Risk.
Limited to Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible Tuesday and Wednesday.
Periodic thunderstorms will occur as well, though many hours will
stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east and southeast at 10 to 20 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 230918
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
418 AM CDT Mon Aug 23 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
418 AM CDT Mon Aug 23 2021 /518 AM EDT Mon Aug 23 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Fog Risk this morning
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION...

Shallow dense fog has developed this morning. This will begin to
erode after sunrise.

A few showers with embedded thunderstorms may move into areas
mainly west of Interstate 39 this morning. Additional gusty
thunderstorms are possible late tonight into Tuesday morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday and Wednesday...
Limited Thunderstorm Risk.
Limited to Excessive Heat Risk.
Thursday through Sunday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.

DISCUSSION:

Hot and humid conditions are expected through at least Wednesday
with heat indices over 100 possible Tuesday and Wednesday.
Periodic thunderstorms will occur as well, though many hours will
stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

Moving toward the east at 30 mph.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 221919
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
219 PM CDT Sun Aug 22 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
219 PM CDT Sun Aug 22 2021 /319 PM EDT Sun Aug 22 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

High Swim Risk.

DISCUSSION...

Dangerous swimming conditions will continue along southern Lake
Michigan beaches through this evening.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday and through Saturday...
Limited Thunderstorm Risk.
Limited to Elevated Excessive Heat Risk.

DISCUSSION:

Hot and humid conditions are expected Monday through at least
Wednesday. Periodic thunderstorms will occur as well, though many
hours will stay dry.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 220907
HWOLOT

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
407 AM CDT Sun Aug 22 2021


Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
407 AM CDT Sun Aug 22 2021 /507 AM EDT Sun Aug 22 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

Limited Fog Risk this morning.
High Swim Risk for Lake Michigan beaches.
Limited Thunderstorm Risk late tonight.

DISCUSSION...

Patchy fog is possible early this morning mainly southeast of
Interstate 57.

Dangerous swimming conditions are expected for southern Lake
Michigan beaches through this evening.

There is a low chance for a few thunderstorms across northwest
Illinois late tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
Limited Thunderstorm Risk.
Limited Flooding Risk.
Limited Excessive Heat Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Thursday through Saturday...
Limited Thunderstorm Risk.

DISCUSSION:

Hot and humid conditions will prevail next week with periodic
chances for gusty thunderstorms and locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be necessary through tonight.
</pre>


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