Severe Storm Outlook Narrative (AC)
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Issued by NWS
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971 ACUS11 KWNS 160234 SWOMCD SPC MCD 160234 IAZ000-MNZ000-MOZ000-KSZ000-NEZ000-160400- Mesoscale Discussion 1283 NWS Storm Prediction Center Norman OK 0934 PM CDT Sat Jun 15 2024 Areas affected...Northwest MO into western/central IA and far southern MN Concerning...Severe Thunderstorm Watch 421... Valid 160234Z - 160400Z The severe weather threat for Severe Thunderstorm Watch 421 continues. SUMMARY...Some threat for isolated damaging wind may spread eastward tonight. DISCUSSION...The storm cluster that earlier produced a 52 kt wind gust in Falls City, NE has since shown signs of weakening over southwest IA, likely due to decreasing instability and increasing MLCINH. Despite the weakening trend, this cluster has a relatively well-established cold pool, and isolated damaging wind remains a possibility as it moves eastward tonight. Farther north, an earlier storm cluster across northeast NE has weakened somewhat as the embedded supercell structures have dissipated. However, a small MCV appears to have formed out of this cluster, and the downstream environment into northwest IA remains somewhat more unstable and less capped compared to farther south. Some threat for damaging wind could spread across northwest IA and far southern MN with time tonight, though the need for additional watch issuance is uncertain and will depend on short-term convective trends. ..Dean/Smith.. 06/16/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MPX...DMX...EAX...FSD...OAX...TOP... LAT...LON 39949536 41099474 42299600 43099568 43719496 43769433 43519353 42099336 41739336 41289328 40669370 40399386 39929465 39949536