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SEL3 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 623 NWS Storm Prediction Center Norman OK 400 PM CDT Thu Aug 15 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southern Iowa Northern Missouri * Effective this Thursday afternoon and evening from 400 PM until 1100 PM CDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail likely with isolated very large hail events to 2 inches in diameter possible A tornado or two possible SUMMARY...Widely scattered thunderstorms are expected to form this afternoon into this evening across southern Iowa/northern Missouri in an environment that supports supercells. Large hail of 1-2 inches in diameter, damaging gusts of 60-75 mph and an isolated tornado or two will be possible. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 60 miles north northwest of Saint Joseph MO to 55 miles east southeast of Ottumwa IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 29030. ...Thompson