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Mesoscale Discussion 270 |
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MESOSCALE DISCUSSION 0270
NWS STORM PREDICTION CENTER NORMAN OK
1156 PM CDT THU APR 09 2015
AREAS AFFECTED...LOWER MI
CONCERNING...SEVERE THUNDERSTORM WATCH 51...
VALID 100456Z - 100630Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 51
CONTINUES.
SUMMARY...LOCALLY DAMAGING WIND POTENTIAL MAY CONTINUE THROUGH THE
EARLY PART OF THE OVERNIGHT ACROSS SOUTHERN/EASTERN LOWER MI AS
SEVERE THUNDERSTORM WATCH 51 CONTINUES.
DISCUSSION...A RELATIVELY WELL-ORGANIZED/SOMEWHAT FRAGMENTED SQUALL
LINE /INCLUDING SOME EMBEDDED BOWS/ CONTINUES TO MAKE A STEADY
EAST-NORTHEASTWARD PROGRESSION ACROSS LOWER MI AS OF 0445Z. WHILE
OVERALL BUOYANCY IS MODEST WITHIN THE WARM SECTOR...IT SHOULD BE
NOTED THAT RAP RUNS OVER THE PAST FEW HOURS APPEAR TO BE ERRONEOUSLY
/VIA TOO MUCH DRY AIR/ IMPACTING SPC MESOANALYSIS WITH RESULTANT
NEAR-ZERO DEPICTIONS OF BUOYANCY. IN ALL LIKELIHOOD...ESPECIALLY
GIVEN THAT SURFACE TEMPERATURES/DEWPOINTS HAVE WARMED OVER THE PAST
FEW HOURS...MOST-UNSTABLE CAPE LIKELY REMAINS GENERALLY NEAR 1000
J/KG IN CONTRAST TO CURRENT MESOANALYSIS. AIDED BY 50-70 KT WINDS
DEPICTED WITHIN THE LOWEST 1-2 KM VIA LOWER MI WSR-88D VWP DATA...A
WELL-ORGANIZED LINEAR MODE WITH EMBEDDED BOWS WILL LIKELY CONTINUE
TO POSE AT LEAST SOME POTENTIAL FOR STRONG/POTENTIALLY SEVERE WIND
GUSTS OVER THE NEXT HOUR OR TWO.
..GUYER.. 04/10/2015
ATTN...WFO...DTX...APX...IWX...GRR...
LAT...LON 42278637 43428521 44038418 43478287 42688303 42168448
42088596 42278637
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