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| Mesoscale Discussion 989 | |
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Mesoscale Discussion 0989 NWS Storm Prediction Center Norman OK 0352 PM CDT Fri Jun 05 2026 Areas affected...portions of west-central and southern Minnesota Concerning...Severe Thunderstorm Watch 274... Valid 052052Z - 052215Z The severe weather threat for Severe Thunderstorm Watch 274 continues. SUMMARY...The threat for large hail and damaging wind gusts continues across newly issued Severe Thunderstorm Watch 274. DISCUSSION...Several discrete/semi-discrete supercells have developed just east of the SD/MN border as of 2030 UTC, with a recent report of 1" hail and a measured gust of 56 kts. A corridor of marginally steeper mid-level lapse rates (6.5+ C/km) analyzed via latest objective analysis and modestly increasing mid-level flow (sampled by the MPX VAD profile) immediately downstream of an approaching shortwave trough will continue to promote the potential for large hail as these storms propagate southeastward, with damaging to occasionally severe wind gusts also possible. A locally greater severe risk may evolve should a storm favorable interact with a remnant outflow boundary from prior convection (evident on visible satellite imagery and surface observations). With time, storms may evolve into one or more bowing segments/clusters, which would favor an attendant increase in the threat for damaging wind gusts. Convective coverage and severity should then gradually wane later this evening as nocturnal cooling/stabilization begins. ..Chalmers/Mosier.. 06/05/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ARX...MPX...FGF...FSD... LAT...LON 43939370 43939421 44029487 44159531 44369563 44669588 45239599 45509593 45839578 46129535 46169509 46079462 45919440 45719417 45529390 45369363 45259328 45199293 45019283 44659273 44439273 44219284 44049302 44009318 43969331 43939370 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN | |
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