MESOSCALE DISCUSSION 1040 NWS STORM PREDICTION CENTER NORMAN OK 1026 AM CDT WED JUN 12 2013 Looks like WW might be issued..... SUMMARY...THE 1630Z CONVECTIVE OUTLOOK WILL INCLUDE A CATEGORICAL UPGRADE TO HIGH RISK FOR DAMAGING WIND POTENTIAL FROM EXTREME EASTERN IOWA INTO NORTHERN PORTIONS OF ILLINOIS AND INDIANA...AND NORTHWEST PORTIONS OF OHIO. IN ADDITION...TORNADO PROBABILITIES WILL BE INCREASED TO 15 PERCENT OVER PORTIONS OF EXTREME EASTERN IOWA INTO NORTHWEST ILLINOIS. DISCUSSION...SVR TSTMS ARE EXPECTED TO DEVELOP THIS AFTERNOON IN THE VICINITY OF EASTERN IOWA/NORTHWEST ILLINOIS AND QUICKLY BECOME SEVERE SUPERCELLS WITH A RISK FOR TORNADOES...POSSIBLY SIGNIFICANT...WITH UPSCALE GROWTH INTO A FAST-MOVING AND FORWARD-PROPAGATING MESOSCALE CONVECTIVE SYSTEM. WIDESPREAD DAMAGING WINDS ARE LIKELY ACROSS THE HIGH RISK AREA...WITH SOME SIGNIFICANT SEVERE GUSTS POSSIBLE. DETAILS WILL BE FORTHCOMING IN THE 1630Z CONVECTIVE OUTLOOK.
Posted on: Wed, 12 Jun 2013 16:29:27 +0000
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