Mesoscale Discussion 0530 NWS Storm Prediction Center Norman OK 0601 PM CDT Thu Apr 20 2017 Areas affected...Eastern IN...Southeast MI...Northwest OH Concerning...Severe Thunderstorm Watch 151... Valid 202301Z - 210000Z The severe weather threat for Severe Thunderstorm Watch 151 continues. SUMMARY...Scattered thunderstorms, a few severe, will continue across the southeastern half of WW151 this evening. DISCUSSION...Considerable convective overturning has occurred across much of the OH Valley this evening. In the absence of significant buoyancy, stronger low-level forcing along the cold front should serve as the primary focus for most organized thunderstorms over the next few hours. With onset of diurnal cooling it appears the greatest risk will be marginally severe hail and locally gusty winds. Just south of the watch over southern IN, a small cluster of strong/severe thunderstorms has developed. This activity has evolved within slightly more unstable air mass where influence from earlier convection was less disruptive. Even so, marginally severe hail and gusty winds should be the primary threats as this convection spreads toward southwest OH. ..Darrow.. 04/20/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND... LAT...LON 42368511 42368199 40348252 40348554 42368511Read more
from SPC Forecast Products http://ift.tt/IogLII
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