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SEL0 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 140 NWS Storm Prediction Center Norman OK 345 PM CDT Thu Apr 17 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northwest and Northern Iowa Southern and Southeast Minnesota Far Northeast Nebraska West-Central Wisconsin * Effective this Thursday afternoon and evening from 345 PM until 1000 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Scattered thunderstorms are forecast to develop and intensify through the early evening across the Watch area. The stronger storms will be capable of a threat for large to very large hail (1 to 2 inches in diameter) and damaging gusts. Upscale growth into a linear cluster is possible this evening across southern Minnesota as this activity moves east towards the Mississippi River. The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 25 miles northeast of Minneapolis MN to 30 miles south southwest of Storm Lake IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 25030. ...Smith