C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 191703
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1203 PM CDT Thu Jun 19 2025
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-
1203 PM CDT Thu Jun 19 2025 /103 PM EDT Thu Jun 19 2025/
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.
DISCUSSION...
There is a slight chance (around 15%) for an isolated
thunderstorms over northeast Illinois and northwest Indiana this
afternoon, mainly east of a Crystal Lake to Kankakee and
Lafayette line.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Saturday and Sunday...
Elevated Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
There is a chance (30-40%) that a thunderstorm complex could move
into northern Illinois from the northwest Friday morning. Though
these storms would likely be in a weakening phase, they may still
be able to produce damaging wind gusts.
Hot and humid weather will develop this weekend into early next
week. Peak afternoon heat indices at or above 100 degrees are
expected for several days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 35 mph.
https://wxn.io/5iycm
Thursday, June 19, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 190947
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
447 AM CDT Thu Jun 19 2025
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-
447 AM CDT Thu Jun 19 2025 /547 AM EDT Thu Jun 19 2025/
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 slight chance (around 15%) of a few isolated
thunderstorms over northeast Illinois and northwest Indiana this
afternoon, mainly east of a Crystal Lake to Kankakee and Lafayette
line. While no severe weather is expected, isolated wind gusts
gusts up to 45 mph may be possible with the strongest storms.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Saturday and Sunday...
Elevated Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
There is a chance (30-40%) that a thunderstorm complex could move
into northern Illinois from the northwest Friday morning. Though
these storms would likely be in a weakening phase, they may still
be able to produce damaging wind gusts.
Hot and humid weather will develop this weekend into early next
week. Peak afternoon heat indices at or above 100 degrees are
expected for several days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 35 mph.
https://wxn.io/3vzoe
FLUS43 KLOT 190947
HWOLOT
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
447 AM CDT Thu Jun 19 2025
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-
447 AM CDT Thu Jun 19 2025 /547 AM EDT Thu Jun 19 2025/
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 slight chance (around 15%) of a few isolated
thunderstorms over northeast Illinois and northwest Indiana this
afternoon, mainly east of a Crystal Lake to Kankakee and Lafayette
line. While no severe weather is expected, isolated wind gusts
gusts up to 45 mph may be possible with the strongest storms.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...
Limited Thunderstorm Risk...with an associated:
Level 1 of 5 Severe Thunderstorm Risk.
Saturday and Sunday...
Elevated Excessive Heat Risk.
Monday...
Limited Thunderstorm Risk.
Elevated Excessive Heat Risk.
Tuesday and Wednesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
There is a chance (30-40%) that a thunderstorm complex could move
into northern Illinois from the northwest Friday morning. Though
these storms would likely be in a weakening phase, they may still
be able to produce damaging wind gusts.
Hot and humid weather will develop this weekend into early next
week. Peak afternoon heat indices at or above 100 degrees are
expected for several days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the southeast at 35 mph.
https://wxn.io/3vzoe
Wednesday, June 18, 2025
Hazardous Weather Outlook for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
FLUS43 KLOT 190221 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
921 PM CDT Wed Jun 18 2025
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-
921 PM CDT Wed Jun 18 2025 /1021 PM EDT Wed Jun 18 2025/
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...Thursday through Tuesday.
Friday...
Limited Thunderstorm Risk.
Saturday through Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Hot and humid weather will develop this weekend into early next
week. Peak afternoon heat indices at or above 100 degrees are
expected for several days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/dyeoo
FLUS43 KLOT 190221 AAA
HWOLOT
Hazardous Weather Outlook...UPDATED
National Weather Service Chicago/Romeoville IL
921 PM CDT Wed Jun 18 2025
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-
921 PM CDT Wed Jun 18 2025 /1021 PM EDT Wed Jun 18 2025/
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...Thursday through Tuesday.
Friday...
Limited Thunderstorm Risk.
Saturday through Monday...
Elevated Excessive Heat Risk.
Tuesday...
Limited Thunderstorm Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Hot and humid weather will develop this weekend into early next
week. Peak afternoon heat indices at or above 100 degrees are
expected for several days.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
https://wxn.io/dyeoo
Areal Flood Advisory Expiration for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WGUS83 KLOT 190125
FLSLOT
Flood Advisory
National Weather Service Chicago IL
825 PM CDT Wed Jun 18 2025
/O.EXP.KLOT.FA.Y.0015.000000T0000Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
825 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY WILL EXPIRE AT 830 PM CDT THIS EVENING...
The Flood Advisory will expire at 830 PM CDT this evening for
portions of north central and northeast Illinois, including the
following areas, in north central Illinois, Boone, De Kalb, Lee and
Ogle. In northeast Illinois, McHenry.
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/zx42f
WGUS83 KLOT 190125
FLSLOT
Flood Advisory
National Weather Service Chicago IL
825 PM CDT Wed Jun 18 2025
/O.EXP.KLOT.FA.Y.0015.000000T0000Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
825 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY WILL EXPIRE AT 830 PM CDT THIS EVENING...
The Flood Advisory will expire at 830 PM CDT this evening for
portions of north central and northeast Illinois, including the
following areas, in north central Illinois, Boone, De Kalb, Lee and
Ogle. In northeast Illinois, McHenry.
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/zx42f
Areal Flood Advisory for McHenry Co., IL until 8:30 PM CDT 6/18
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WGUS83 KLOT 182304
FLSLOT
Flood Advisory
National Weather Service Chicago IL
604 PM CDT Wed Jun 18 2025
/O.CON.KLOT.FA.Y.0015.000000T0000Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
604 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 830 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Portions of north central and northeast Illinois,
including the following counties, in north central Illinois,
Boone, De Kalb, Lee and Ogle. In northeast Illinois, McHenry.
* WHEN...Until 830 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks.
Underpasses may be flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 602 PM CDT, Doppler radar indicated heavy rainfall rates
exceeding 1 inch per hour due to slow moving showers. Up to 2
inches of rain have fallen near Belvidere and Harvard.
- Rainfall amounts up to 2 inches are possible due to this
shower activity.
- Some locations that may experience flooding include...
DeKalb, Crystal Lake, Algonquin, Lake in the Hills, McHenry,
Belvidere, Woodstock, Huntley, Sycamore, Dixon, Fox Lake,
Rochelle, Harvard, Island Lake, Marengo, Poplar Grove, Genoa,
Cary, Johnsburg and Lakemoor.
- http://www.weather.gov/safety/flood
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 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/lkdcu
WGUS83 KLOT 182304
FLSLOT
Flood Advisory
National Weather Service Chicago IL
604 PM CDT Wed Jun 18 2025
/O.CON.KLOT.FA.Y.0015.000000T0000Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
604 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 830 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Portions of north central and northeast Illinois,
including the following counties, in north central Illinois,
Boone, De Kalb, Lee and Ogle. In northeast Illinois, McHenry.
* WHEN...Until 830 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks.
Underpasses may be flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 602 PM CDT, Doppler radar indicated heavy rainfall rates
exceeding 1 inch per hour due to slow moving showers. Up to 2
inches of rain have fallen near Belvidere and Harvard.
- Rainfall amounts up to 2 inches are possible due to this
shower activity.
- Some locations that may experience flooding include...
DeKalb, Crystal Lake, Algonquin, Lake in the Hills, McHenry,
Belvidere, Woodstock, Huntley, Sycamore, Dixon, Fox Lake,
Rochelle, Harvard, Island Lake, Marengo, Poplar Grove, Genoa,
Cary, Johnsburg and Lakemoor.
- http://www.weather.gov/safety/flood
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 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/lkdcu
Special Weather Statement for McHenry Co., IL
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WWUS83 KLOT 182239
SPSLOT
Special Weather Statement
National Weather Service Chicago/Romeoville
539 PM CDT Wed Jun 18 2025
De Kalb IL-Boone IL-McHenry IL-Ogle IL-Lee IL-
539 PM CDT Wed Jun 18 2025
...FUNNEL CLOUDS POSSIBLE ACROSS CENTRAL LEE...SOUTHEASTERN
OGLE...NORTHWESTERN DE KALB...NORTHWESTERN MCHENRY AND SOUTHERN
BOONE COUNTIES THROUGH 630 PM CDT...
Showers and embedded thunderstorms will continue to shift east
across parts of Lee, Ogle, Boone, McHenry, and NW DeKalb Counties.
Conditions are favorable for funnel clouds with these showers. In
rare occasions, these funnel clouds can briefly reach the ground as
a weak landspout tornado. If they occur, these type of landspouts
tend to weak, brief, and tend to produce minimal damage. Movement
was east at 25 mph.
If threatening weather approaches, seek shelter indoors.
Locations impacted include...
Amboy, Lindenwood, Fairdale, Ashton, Kings, Chana, Harvard, Hebron,
Franklin Grove, Hillcrest, Nachusa, Garden Prairie, Chemung, Eldena,
Greenwood, Kirkland, Davis Junction, Lee Center, Rochelle, Woodhaven
Lakes, Monroe Center, Marengo, Belvidere, Richmond, and Wonder Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4249 8820 4201 8892 4159 8936 4159 8963
4204 8922 4215 8906 4215 8894 4223 8894
4249 8856
TIME...MOT...LOC 2238Z 260DEG 22KT 4239 8857 4203 8916 4165 8949
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
https://wxn.io/oeom2
WWUS83 KLOT 182239
SPSLOT
Special Weather Statement
National Weather Service Chicago/Romeoville
539 PM CDT Wed Jun 18 2025
De Kalb IL-Boone IL-McHenry IL-Ogle IL-Lee IL-
539 PM CDT Wed Jun 18 2025
...FUNNEL CLOUDS POSSIBLE ACROSS CENTRAL LEE...SOUTHEASTERN
OGLE...NORTHWESTERN DE KALB...NORTHWESTERN MCHENRY AND SOUTHERN
BOONE COUNTIES THROUGH 630 PM CDT...
Showers and embedded thunderstorms will continue to shift east
across parts of Lee, Ogle, Boone, McHenry, and NW DeKalb Counties.
Conditions are favorable for funnel clouds with these showers. In
rare occasions, these funnel clouds can briefly reach the ground as
a weak landspout tornado. If they occur, these type of landspouts
tend to weak, brief, and tend to produce minimal damage. Movement
was east at 25 mph.
If threatening weather approaches, seek shelter indoors.
Locations impacted include...
Amboy, Lindenwood, Fairdale, Ashton, Kings, Chana, Harvard, Hebron,
Franklin Grove, Hillcrest, Nachusa, Garden Prairie, Chemung, Eldena,
Greenwood, Kirkland, Davis Junction, Lee Center, Rochelle, Woodhaven
Lakes, Monroe Center, Marengo, Belvidere, Richmond, and Wonder Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4249 8820 4201 8892 4159 8936 4159 8963
4204 8922 4215 8906 4215 8894 4223 8894
4249 8856
TIME...MOT...LOC 2238Z 260DEG 22KT 4239 8857 4203 8916 4165 8949
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
https://wxn.io/oeom2
Areal Flood Advisory for McHenry Co., IL until 8:30 PM CDT 6/18
C: Mchenrycountywx | L: Woodstock | PL: McHenry County WX
WGUS83 KLOT 182233
FLSLOT
Flood Advisory
National Weather Service Chicago IL
533 PM CDT Wed Jun 18 2025
/O.NEW.KLOT.FA.Y.0015.250618T2233Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
533 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY IN EFFECT UNTIL 830 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Portions of north central and northeast Illinois,
including the following counties, in north central Illinois,
Boone, De Kalb, Lee and Ogle. In northeast Illinois, McHenry.
* WHEN...Until 830 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks.
Underpasses may be flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 531 PM CDT, Doppler radar indicated heavy rainfall moving
into the area with rainfall rates exceeding 1 inch per hour.
Up to 0.5 inches of rain have fallen.
- Isolated rainfall amounts up to 2 inches are possible over
the area, which may cause flooding.
- Some locations that will experience flooding include...
DeKalb, Crystal Lake, Algonquin, Lake in the Hills, McHenry,
Belvidere, Woodstock, Huntley, Sycamore, Dixon, Fox Lake,
Rochelle, Harvard, Island Lake, Marengo, Poplar Grove, Genoa,
Cary, Johnsburg and Lakemoor.
- http://www.weather.gov/safety/flood
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 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/axzj2
WGUS83 KLOT 182233
FLSLOT
Flood Advisory
National Weather Service Chicago IL
533 PM CDT Wed Jun 18 2025
/O.NEW.KLOT.FA.Y.0015.250618T2233Z-250619T0130Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone IL-De Kalb IL-Lee IL-McHenry IL-Ogle IL-
533 PM CDT Wed Jun 18 2025
...FLOOD ADVISORY IN EFFECT UNTIL 830 PM CDT THIS EVENING...
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Portions of north central and northeast Illinois,
including the following counties, in north central Illinois,
Boone, De Kalb, Lee and Ogle. In northeast Illinois, McHenry.
* WHEN...Until 830 PM CDT.
* IMPACTS...Creeks and streams may rise out of their banks.
Underpasses may be flooded. Roads and streets may be flooded.
* ADDITIONAL DETAILS...
- At 531 PM CDT, Doppler radar indicated heavy rainfall moving
into the area with rainfall rates exceeding 1 inch per hour.
Up to 0.5 inches of rain have fallen.
- Isolated rainfall amounts up to 2 inches are possible over
the area, which may cause flooding.
- Some locations that will experience flooding include...
DeKalb, Crystal Lake, Algonquin, Lake in the Hills, McHenry,
Belvidere, Woodstock, Huntley, Sycamore, Dixon, Fox Lake,
Rochelle, Harvard, Island Lake, Marengo, Poplar Grove, Genoa,
Cary, Johnsburg and Lakemoor.
- http://www.weather.gov/safety/flood
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 4204 8910 4215 8894 4249 8871 4250 8820
4216 8820 4216 8859 4190 8860 4189 8894
4177 8894 4176 8963 4190 8963 4191 8944
https://wxn.io/axzj2
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