844 WWUS20 KWNS 032335 SEL1 SPC WW 032335 IAZ000-ILZ000-INZ000-LMZ000-040700- URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 451 NWS Storm Prediction Center Norman OK 640 PM CDT Fri Jul 3 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Iowa Northern Illinois Northwest Indiana Lake Michigan * Effective this Friday night and Saturday morning from 640 PM until 200 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...A cluster of thunderstorms should pose a threat for mainly scattered severe/damaging winds as it tracks east-southeastward this evening into early Saturday morning. Peak gusts may reach up to 60-70 mph. Isolated hail and perhaps a brief tornado or two may also occur with any cells that can move along/near a boundary. The severe thunderstorm watch area is approximately along and 55 statute miles north and south of a line from 40 miles west northwest of Moline IL to Valparaiso IN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). 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 446...WW 447...WW 448...WW 449...WW 450... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Gleason
