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| Mesoscale Discussion 1830 | |
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Mesoscale Discussion 1830 NWS Storm Prediction Center Norman OK 1044 PM CDT Mon Jul 28 2025 Areas affected...Southeast Minnesota...Far Northeast Iowa...Western Wisconsin Concerning...Severe Thunderstorm Watch 553...555... Valid 290344Z - 290545Z The severe weather threat for Severe Thunderstorm Watch 553, 555 continues. SUMMARY...Isolated damaging wind gusts will be possible over the next few hours across parts of southeast Minnesota, far northeast Iowa and western Wisconsin. Although a severe threat will likely persist, the threat should be too isolated to the east of the ongoing watches for new watch issuance. DISCUSSION...The latest hi-resolution radar imagery from Minneapolis, Minnesota shows a well-developed severe line segment from western Wisconsin into southeast Minnesota. This line is located along the northeastern edge of a moderately unstable airmass, where MLCAPE is estimated by the RAP in the 1000 to 2000 J/kg range, and surface dewpoints are in the lower 70s F. An isolated wind-damage threat may be maintained with the stronger segments within the line, as it tracks south-southeastward along the instability gradient over the next couple of hours. The latest RAP shows weaker instability present over far northeast Iowa and southwest Wisconsin, suggesting that the line should gradually weaken as it moves further southeast. ..Broyles.. 07/29/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MKX...ARX...MPX... LAT...LON 43149024 43679019 44319048 44789089 45239150 45319201 45049274 44639296 44069240 43229170 42779114 42829063 43149024 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN |
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