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Mesoscale Discussion 1605 | |
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Mesoscale Discussion 1605 NWS Storm Prediction Center Norman OK 1000 PM CDT Sat Jul 13 2024 Areas affected...northeast IA...southwest WI...northwest IL Concerning...Severe Thunderstorm Watch 526... Valid 140300Z - 140400Z The severe weather threat for Severe Thunderstorm Watch 526 continues. SUMMARY...Sporadic strong to localized severe gusts should remain possible through about Midnight-1 am CDT along the portion of the Mississippi River bordering Wisconsin, Iowa, and Illinois. An additional severe thunderstorm watch appears unlikely. DISCUSSION...While the leading MCS in WI clearly weakened, the trailing cluster appeared to have weakened for a time across northeast IA before a recent uptick in reflectivity and cloud top cooling over Clayton County, IA and Grant County, WI. The airmass immediately to the south and southwest of this small cluster remains amply unstable. But the bulk of the convection appears likely to mostly overrun the remnant outflow boundary that is stalling in the wake of the lead MCS. This merger process could yield another uptick in convective intensity before broader weakening trends amid increasing MLCIN occur overnight. ..Grams.. 07/14/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LOT...MKX...DVN...ARX... LAT...LON 43249071 42888993 42528912 42098895 41808920 41799012 41889057 42139105 42429148 42829169 42979108 43249071 |
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