

343 

WWUS20 KWNS 101845

SEL8

SPC WW 101845

ILZ000-INZ000-MIZ000-WIZ000-LMZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 138

NWS Storm Prediction Center Norman OK

145 PM CDT Mon Apr 10 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern and central Illinois

  Northwest Indiana

  Southeast Lower Michigan

  Southern Wisconsin

  Lake Michigan



* Effective this Monday afternoon and evening from 145 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Increasingly scattered storms are expected along and ahead

of a cold front into this evening, which may develop into a

fast-moving cluster. Severe hail and damaging winds are the primary

hazards.



The severe thunderstorm watch area is approximately along and 100

statute miles north and south of a line from 5 miles south of Moline

IL to 40 miles east of Grand Rapids MI. For a complete depiction of

the watch see the associated watch outline update (WOUS64 KWNS

WOU8).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Severe Thunderstorm Watch means conditions are

favorable for severe thunderstorms in and close to the watch area.

Persons in these areas should be on the lookout for threatening

weather conditions and listen for later statements and possible

warnings. Severe thunderstorms can and occasionally do produce

tornadoes.



&&



AVIATION...A few severe thunderstorms with hail surface and aloft to

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

24035.



...Grams



779 

WWUS20 KWNS 101845 CCA

SEL8

SPC WW 101845 CCA

ILZ000-INZ000-MIZ000-WIZ000-LMZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 138

NWS Storm Prediction Center Norman OK

145 PM CDT Mon Apr 10 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northern and central Illinois

  Northwest Indiana

  Southwest Lower Michigan

  Southern Wisconsin

  Lake Michigan



* Effective this Monday afternoon and evening from 145 PM until

  1000 PM CDT.



* Primary threats include...

  Scattered damaging winds and isolated significant gusts to 75

    mph possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible

  A tornado or two possible



SUMMARY...Increasingly scattered storms are expected along and ahead

of a cold front into this evening, which may develop into a

fast-moving cluster. Severe hail and damaging winds are the primary

hazards.



The severe thunderstorm watch area is approximately along and 100

statute miles north and south of a line from 5 miles south of Moline

IL to 40 miles east of Grand Rapids MI. For a complete depiction of

the watch see the associated watch outline update (WOUS64 KWNS

WOU8).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Severe Thunderstorm Watch means conditions are

favorable for severe thunderstorms in and close to the watch area.

Persons in these areas should be on the lookout for threatening

weather conditions and listen for later statements and possible

warnings. Severe thunderstorms can and occasionally do produce

tornadoes.



&&



AVIATION...A few severe thunderstorms with hail surface and aloft to

2 inches. Extreme turbulence and surface wind gusts to 65 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

24035.



...Grams

