Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 011711 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 1211 PM CDT Sun Jul 1 2018

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 1211 PM CDT Sun Jul 1 2018 /111 PM EDT Sun Jul 1 2018/

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…

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

DISCUSSION…

Thunderstorms will develop early this afternoon west of I-39 and quickly increase in coverage through mid afternoon across much of northern Illinois, and then continue developing into northwest Indiana late this afternoon and early evening. Some of the stronger storms will be capable of producing damaging winds, along with heavy downpours which could lead to localized flooding.

.DAYS TWO THROUGH SEVEN…Monday through Saturday.

Monday…

Limited Thunderstorm Risk.

Tuesday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.

Wednesday and Thursday…

Limited Thunderstorm Risk.  Elevated Excessive Heat Risk.

Friday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.  High Swim Risk

Saturday…

High Swim Risk

DISCUSSION:

Hot and humid conditions will return Tuesday and likely stay through Thursday. There will be periodic chances for thunderstorms during the upcoming week, mainly during the afternoon and evening hours.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward northeast to east at around 30 mph.

</pre>

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Mesoscale Discussion for McHenry Co., IL

<pre>ACUS11 KWNS 011637 SWOMCD

Mesoscale Discussion 0973 NWS Storm Prediction Center Norman OK 1137 AM CDT Sun Jul 01 2018

Areas affected…Southern and Eastern Wisconsin…Northern Illinois…and Southern Upper Michigan.

Concerning…Severe potential…Watch likely

Valid 011637Z – 011800Z

Probability of Watch Issuance…80 percent

SUMMARY…A few storms have formed west of Green Bay. Additional storms are expected to form in the next hour or two along and ahead of a cold front. These storms will pose a primary threat of damaging winds, however, a tornado or two is also possible.

DISCUSSION…Storms have started to form west of Green Bay. While these storms will likely only pose a marginal severe threat as they move into an increasingly stable airmass, additional storm development is expected in the next hour or two along the cold front. Low-level moisture advection combined with surface heating in the relatively cloud free airmass in southern Wisconsin will lead to additional destabilization ahead of these developing storms. MLCAPE is already over 2500 J/kg in southern Wisconsin with this buoyancy expected across much of eastern Wisconsin within the next few hours. MLCAPE of 500 to 1000 J/kg is expected to advect as far north as at least southern Upper Michigan. Effective shear of 40 to 50 knots per the latest RAP mesoanalysis combined with the expected moderate to strong instability will provide an environment favorable for severe storms this afternoon. Current ARX and GRB VWP 1 km winds of 30 to 35 knots with strengthening flow expected through the day, will support a damaging wind threat, however, a greater tornado threat will exist in areas with backed surface flow (currently in east central Wisconsin). Given the strong linear forcing, storms are expected to congeal into a squall line relatively quickly. While the linear nature may limit the overall tornado threat, embedded supercells in addition to any discrete storms that can form ahead of the line will likely pose a greater tornado concern.

..Bentley/Hart.. 07/01/2018

…Please see www.spc.noaa.gov for graphic product…

ATTN…WFO…MQT…GRB…LOT…MKX…DVN…DLH…ARX…

LAT…LON 46278966 45279030 43769115 43339121 42809109 42569076

42339020 42218906 42298803 42468761 43598747 44878707  45428680 45898687 46388742 46718852 46278966 </pre>

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Flood Warning for McHenry Co., IL until 07:00 AM CDT 7/4

<pre>WGUS83 KLOT 011416 FLSLOT

Flood Statement National Weather Service Chicago/Romeoville IL 916 AM CDT Sun Jul 1 2018

…The Flood Warning continues for the following rivers in Illinois…

Des Plaines River near Gurnee affecting Lake County  Des Plaines River at Lincolnshire affecting Lake County  Des Plaines River near Des Plaines affecting Cook County  Fox River at Montgomery affecting Kane and Kendall Counties  Fox River at Algonquin Tailwater affecting Kane and McHenry  Counties

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Safety message…If you encounter a flooded roadway…turn around and find an alternate route.

&&

/O.CON.KLOT.FL.W.0075.000000T0000Z-180704T1200Z/ /AFBI2.2.ER.180621T1607Z.180627T0300Z.180704T0600Z.UU/ 916 AM CDT Sun Jul 1 2018

The Flood Warning continues for

The Fox River at Algonquin Tailwater.

• until Wednesday morning.

• At 830 AM Sunday the stage was 10.2 feet.

• Flood stage is 9.5 feet.

• Minor flooding is occurring and Minor flooding is forecast.

• Forecast…The river will continue to fall to below flood stage by early Wednesday morning.

&&

LAT…LON 4238 8830 4237 8817 4221 8814 4194 8827

4195 8838 4224 8828

</pre>

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Excessive Heat Warning for McHenry Co., IL until 07:00 PM CDT 7/1

<pre>WWUS73 KLOT 011406 NPWLOT

URGENT – WEATHER MESSAGE National Weather Service Chicago IL 906 AM CDT Sun Jul 1 2018

…Excessive Heat Continues…

/O.CON.KLOT.EH.W.0002.000000T0000Z-180702T0000Z/ McHenry-Lake IL-Kane-DuPage-La Salle-Kendall-Grundy-Will-Kankakee- Livingston-Iroquois-Ford-Lake IN-Porter-Newton-Jasper-Benton- Including the cities of Woodstock, Waukegan, Aurora, Elgin, Wheaton, Ottawa, Oswego, Morris, Joliet, Kankakee, Pontiac, Watseka, Paxton, Gary, Valparaiso, Morocco, Rensselaer, and Fowler 906 AM CDT Sun Jul 1 2018 /1006 AM EDT Sun Jul 1 2018/

…EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT /8 PM EDT/ THIS EVENING…

• TEMPERATURES…Highs in the lower to mid 90s.

• HEAT INDICES…Peak afternoon heat indices in the 105 to 110 degree range.

• IMPACTS…The cumulative effects of several days with very hot temperatures and oppressive humidity will lead to potentially hazardous conditions, particularly for the elderly and those with pre-existing health conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Take extra precautions…if you work or spend time outside. When possible…reschedule strenuous activities. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.

An Excessive Heat Warning means that a prolonged period of dangerously high temperatures will occur. The combination of high temperatures and high humidity will combine to create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids…stay in an air-conditioned room…stay out of the sun… and check up on relatives and neighbors.

Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes.

&& </pre>

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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 010822 CCA HWOLOT

Hazardous Weather Outlook…CORRECTED National Weather Service Chicago/Romeoville IL 322 AM CDT Sun Jul 1 2018

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 322 AM CDT Sun Jul 1 2018 /422 AM EDT Sun Jul 1 2018/

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

.DAY ONE…Early this Morning through Tonight.

Weather hazards expected…

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

DISCUSSION…

Thunderstorms will increase in coverage this afternoon and continue into this evening. Some of the stronger storms could be capable of producing damaging winds.

.DAYS TWO THROUGH SEVEN…Monday through Saturday.

Monday…

Limited Thunderstorm Risk southeast of Pontiac to Gary.

Tuesday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.

Wednesday and Thursday…

Limited Thunderstorm Risk.  Elevated Excessive Heat Risk.

Friday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.  High Swim Risk

Saturday…

High Swim Risk

DISCUSSION:

Hot and humid conditions will return Tuesday and likely stay through Thursday. There will be periodic chances for thunderstorms during the upcoming week, mainly during the afternoon and evening hours.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward northeast to east at 30 mph.

</pre>

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Hazardous Weather Outlook for McHenry Co., IL

<pre>FLUS43 KLOT 010818 HWOLOT

Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 318 AM CDT Sun Jul 1 2018

Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 318 AM CDT Sun Jul 1 2018 /418 AM EDT Sun Jul 1 2018/

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

.DAY ONE…Early this Morning through Tonight.

Weather hazards expected…

Significant Thunderstorm Risk...with an associated:     Limited hail risk...up to Nickel size.     Elevated damaging wind risk...up to 60 mph.  Elevated Excessive heat Risk.

DISCUSSION…

Thunderstorms will increase in coverage this afternoon and continue into this evening. Some of the stronger storms could be capable of producing damaging winds.

.DAYS TWO THROUGH SEVEN…Monday through Saturday.

Monday…

Limited Thunderstorm Risk southeast of Pontiac to Gary.

Tuesday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.

Wednesday and Thursday…

Limited Thunderstorm Risk.  Elevated Excessive Heat Risk.

Friday…

Limited Thunderstorm Risk.  Limited Excessive Heat Risk.  High Swim Risk

Saturday…

High Swim Risk

DISCUSSION:

Hot and humid conditions will return Tuesday and likely stay through Thursday. There will be periodic chances for thunderstorms during the upcoming week, mainly during the afternoon and evening hours.

.SPOTTER INFORMATION STATEMENT…

Spotters may be needed this afternoon and evening.

GENERAL STORM MOTION OF THE DAY:

Moving toward northeast to east at 30 mph.

</pre>

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Excessive Heat Warning for McHenry Co., IL until 07:00 PM CDT 7/1

<pre>WWUS73 KLOT 010758 NPWLOT

URGENT – WEATHER MESSAGE National Weather Service Chicago IL 258 AM CDT Sun Jul 1 2018

…Excessive Heat Continues…

/O.CON.KLOT.EH.W.0002.000000T0000Z-180702T0000Z/ McHenry-Lake IL-Kane-DuPage-La Salle-Kendall-Grundy-Will-Kankakee- Livingston-Iroquois-Ford-Lake IN-Porter-Newton-Jasper-Benton- Including the cities of Woodstock, Waukegan, Aurora, Elgin, Wheaton, Ottawa, Oswego, Morris, Joliet, Kankakee, Pontiac, Watseka, Paxton, Gary, Valparaiso, Morocco, Rensselaer, and Fowler 258 AM CDT Sun Jul 1 2018 /358 AM EDT Sun Jul 1 2018/

…EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT /8 PM EDT/ THIS EVENING…

• TEMPERATURES…Highs in the lower to mid 90s.

• HEAT INDICES…Peak afternoon heat indices in the 105 to 110 degree range.

• IMPACTS…The cumulative effects of several days with very hot temperatures and oppressive humidity will lead to potentially hazardous conditions, particularly for the elderly and those with pre-existing health conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Take extra precautions…if you work or spend time outside. When possible…reschedule strenuous activities. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.

An Excessive Heat Warning means that a prolonged period of dangerously high temperatures will occur. The combination of high temperatures and high humidity will combine to create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids…stay in an air-conditioned room…stay out of the sun… and check up on relatives and neighbors.

Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes.

&& </pre>

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