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953 

WWUS20 KWNS 210238

SEL7

SPC WW 210238

ILZ000-INZ000-LMZ000-210700-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 297

NWS Storm Prediction Center Norman OK

940 PM CDT Sun Jun 20 2021



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeast Illinois

  Northwest Indiana

  Lake Michigan



* Effective this Sunday night and Monday morning from 940 PM

  until 200 AM CDT.



* Primary threats include...

  Scattered damaging wind gusts to 65 mph possible

  Isolated large hail events to 1.5 inches in diameter possible

  A tornado or two possible



SUMMARY...Clusters of storms will continue to move eastward across

northern Illinois toward the Chicagoland area and southern Lake

Michigan and eventually northwest Indiana. Damaging winds are the

most likely concern, but some severe hail is also possible and a

tornado cannot be ruled out.



The severe thunderstorm watch area is approximately along and 45

statute miles east and west of a line from 80 miles north northwest

of Valparaiso IN to 65 miles southwest of Valparaiso IN. For a

complete depiction of the watch see the associated watch outline

update (WOUS64 KWNS WOU7).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 294...WW 295...WW 296...



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

1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A

few cumulonimbi with maximum tops to 550. Mean storm motion vector

29030.



...Guyer

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