MD 1540 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PORTIONS OF NORTHEAST WISCONSIN AND THE UP/LP OF MICHIGAN

Mesoscale Discussion 1540NWS Storm Prediction Center Norman OK0328 PM CDT Wed Jul 02 2025Areas affected...portions of northeast Wisconsin and the UP/LP ofMichiganConcerning...Severe potential...Watch unlikely Valid 022028Z - 022200ZProbability of Watch Issuance...5 percentSUMMARY...Isolated severe winds gusts/hail possible thisafternoon/evening.DISCUSSION...Visible satellite/radar shows a small cluster of cellsover portions of northeast Wisconsin, and a few isolated cells overthe LP of Michigan, traversing southeast. These storms initiatedduring the heating of the day amid a weakly capped environment.Persistent downstream heating, where dew point temperatures are inthe low 60s F, is yielding MLCAPE values near 1000 J/kg and lowlevel lapse rates near 9 C/km. The weak instability combined withmarginal deep-layer shear (approaching 25-35 kt) should limit stormorganization. That said, some potential exists for a localizeddamaging wind gust or severe hail with the strongest cellsthroughout the remainder of the afternoon and into the evening...Karstens/Mosier.. 07/02/2025...Please see www.spc.noaa.gov for graphic product...ATTN...WFO...DTX...APX...GRR...MQT...GRB...MKX...ARX...LAT...LON 45918727 45928808 45558936 45098997 44308987 43708952 43438906 43128768 42898593 42768480 42698390 42968291 43888303 44338350 45078356 45378498 45878694 45838684 45918727 MOST PROBABLE PEAK WIND GUST...UP TO 60 MPHMOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
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