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SEL8 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 658 NWS Storm Prediction Center Norman OK 510 PM CDT Tue Aug 27 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Northwest Indiana Far Southeast Wisconsin Lake Michigan * Effective this Tuesday afternoon and evening from 510 PM until 1100 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 SUMMARY...Thunderstorms should continue to grow in coverage and intensity this afternoon and evening as they move east-southeastward. Large hail around 1-2 inches in diameter will be a threat with any supercells, but severe/damaging winds generally around 60-70 mph may also occur if thunderstorms can grow into a small cluster. The severe thunderstorm watch area is approximately along and 45 statute miles east and west of a line from 15 miles west of Racine WI to 55 miles southeast of Marseilles IL. 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. && OTHER WATCH INFORMATION...CONTINUE...WW 656...WW 657... 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 30025. ...Gleason