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SEL3 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 73 NWS Storm Prediction Center Norman OK 415 PM EDT Sun Mar 30 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southwest Lower Michigan Lake Michigan * Effective this Sunday afternoon and evening from 415 PM until 900 PM EDT. * Primary threats include... Scattered damaging winds likely with isolated significant gusts to 75 mph possible Scattered large hail events to 1 inch in diameter possible A tornado or two possible SUMMARY...A well-developed squall line with bowing segments will move quickly northeastward from Indiana into southwest Lower Michigan through the afternoon/evening. Swaths of damaging winds (60-75 mph) are likely with this squall line, along with the potential for isolated large hail and a tornado or two with embedded circulations. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 40 miles north of Grand Rapids MI to 10 miles southwest of Kalamazoo MI. 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. && OTHER WATCH INFORMATION...CONTINUE...WW 70...WW 71...WW 72... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 23050. ...Thompson