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| Mesoscale Discussion 1678 | |
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Mesoscale Discussion 1678 NWS Storm Prediction Center Norman OK 0510 PM CDT Tue Jul 15 2025 Areas affected...central Minnesota...northern Wisconsin. Upper Michigan Concerning...Severe Thunderstorm Watch 513... Valid 152210Z - 160015Z The severe weather threat for Severe Thunderstorm Watch 513 continues. SUMMARY...Threat for severe wind and occasional severe hail continues within WW513. DISCUSSION...Broken lines of thunderstorm activity continue near the surface cold front across central Minnesota into northern Wisconsin and the Upper Michigan Peninsula. Deep layer shear around 20-30 kts is largely parallel to and located near the cold front. As such, some disorganized mainly multi-cell clusters continue to track east-northeastward. South of the cold front, shear decreases but steep low level lapse rates around 8-8.5 C/km and a very warm/unstable air mass will continue to support instances of severe gusts. Some marginally severe hail may be possible near the cold front and in the vicinity of better deep layer shear. ..Thornton.. 07/15/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MQT...GRB...DLH...MPX... LAT...LON 44999520 45339514 45709502 46179465 46509401 46679313 46719232 46769139 46898995 47028937 47138869 46818805 46558796 46038822 45748933 45569037 45099298 44989428 44909498 44999520 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN |
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