SPC Severe Thunderstorm Watch 455

WW 455 SEVERE TSTM IL IN LM 041735Z - 050000Z URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 455 NWS Storm Prediction Center Norman OK 1235 PM CDT Sat Jul 4 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Northwest Indiana Lake Michigan * Effective this Saturday afternoon and evening from 1235 PM until 700 PM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorms will develop across the watch area through the afternoon in a relatively hot and humid air mass. The strongest cells will pose a risk of locally damaging wind gusts. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 45 miles northwest of Bloomington IL to 45 miles north northeast of Danville IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). 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 454... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 25025. ...Hart Read more