AI Summary

WW 338 SEVERE TSTM IL IN MI OH LM 162010Z - 170300Z URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 338 NWS Storm Prediction Center Norman OK 410 PM EDT Tue Jun 16 2026 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of East Central Illinois Northern and Central Indiana Southern Lower Michigan Northwest Ohio Lake Michigan * Effective this Tuesday afternoon and evening from 410 PM until 1100 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Thunderstorms will form this afternoon along a cold front and sweep eastward across the watch area. The strongest storms will be capable of damaging winds and large hail. A tornado or two is also possible. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 30 miles south of Terre Haute IN to 30 miles east northeast of Grand Rapids MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24030. ...Hart Read more

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