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| Mesoscale Discussion 1915 | |
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Mesoscale Discussion 1915 NWS Storm Prediction Center Norman OK 0851 PM CDT Thu Aug 15 2024 Areas affected...Southeastern Iowa and northeastern Missouri...into western Illinois Concerning...Severe Thunderstorm Watch 623... Valid 160151Z - 160315Z The severe weather threat for Severe Thunderstorm Watch 623 continues. SUMMARY...A local extension of WW 623, and perhaps a new downstream watch, may be needed as convection crosses the Mississippi River into Illinois. DISCUSSION...Despite some stabilization of the nocturnal boundary layer, a loosely organized cluster of thunderstorms in southeastern Iowa has maintained its intensity in an environment with > 3000 J/kg MUCAPE and deep-layer shear of 35-40 kts. The environment downstream will likely continue to support these storms well after dark, with additional upscale growth and organization not out of the question. The primary threat is for damaging winds, especially if upscale growth and subsequent leading-edge outflow develops, though some uncertainty remains in whether this will occur. ..Halbert/Squitieri.. 08/16/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LOT...ILX...LSX...DVN...DMX...EAX... LAT...LON 40189215 40659237 41299233 41519218 41719149 41729060 41698989 41528939 41138913 40768927 40368971 40229057 40159139 40189215 |
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