SPC Severe Thunderstorm Watch 539
WW 539 SEVERE TSTM IA IL MO WI 152020Z – 160400Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 539 NWS Storm Prediction Center Norman OK 320 PM CDT Mon Jul 15 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Eastern Iowa Northwest Illinois Northeast Missouri Southwest Wisconsin * Effective this Monday afternoon and evening from 320 PM until 1100 PM CDT. * Primary threats include... Widespread damaging winds and isolated significant gusts to 85 mph likely Scattered large hail likely with isolated very large hail events to 2.5 inches in diameter possible A tornado or two possible SUMMARY...Intense thunderstorms will soon develop across Iowa in a very moist and unstable air mass. Activity will track eastward and organize into a fast-moving bowing cluster, capable of very damaging wind gusts and large hail. A tornado or two is also possible across this region. The severe thunderstorm watch area is approximately along and 85 statute miles north and south of a line from 25 miles west of Des Moines IA to 5 miles east southeast of Rockford IL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). 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 538... AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 75 knots. A few cumulonimbi with maximum tops to 600. Mean storm motion vector 27035. ...Hart
