Multiple lines and clusters of thunderstorms will move across the watch area this afternoon and early evening, posing a risk of locally damaging wind gusts and isolated hail. A tornado or two cannot be ruled out.
SEL0 URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 390 NWS Storm Prediction Center Norman OK 315 PM EDT Sat Jul 24 2021 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Central and Southern Lower Michigan Lake Huron * Effective this Saturday afternoon and evening from 315 PM until 1000 PM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible A tornado or two possible SUMMARY...Multiple lines and clusters of thunderstorms will move across the watch area this afternoon and early evening, posing a risk of locally damaging wind gusts and isolated hail. A tornado or two cannot be ruled out. The severe thunderstorm watch area is approximately along and 65 statute miles north and south of a line from 40 miles east of Oscoda MI to 35 miles west of Grand Rapids MI. 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 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 28030. ...Hart
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