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Mesoscale Discussion 649 |
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MESOSCALE DISCUSSION 0649
NWS STORM PREDICTION CENTER NORMAN OK
1127 PM CDT WED APR 27 2011
AREAS AFFECTED...WRN/CNTRL VA...ERN WV...WRN MD...NWRN NC
CONCERNING...TORNADO WATCH 240...
VALID 280427Z - 280530Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 240 CONTINUES.
TORNADO WATCH 240 IS SCHEDULED TO EXPIRE AT 06Z AND WILL BE
REDEFINED SOON WITH A REPLACEMENT WW.
NUMEROUS ROTATING STORMS PERSIST WITHIN A LARGER CONVECTIVE COMPLEX
ACROSS THE CNTRL APPALACHIANS FROM THE MD PANHANDLE ACROSS ERN WV
INTO SWRN VA. LATEST OBJECTIVE ANALYSIS INDICATES DOWNSTREAM AIR
MASS REMAINS MODERATELY UNSTABLE WITH UPPER 60S TO LOWER 70S SURFACE
DEW POINTS COMMON ACROSS THE PIEDMONT. GIVEN PRESENCE OF EXTREME
LOW-LEVEL SHEAR...0-1 KM SRH AROUND 500 M2/S2 SAMPLED BY LWX/FCX VWP
DATA...ATTENDANT THREATS FOR TORNADOES AND DAMAGING WINDS/LARGE HAIL
WILL LIKELY PERSIST BEYOND 06Z WW EXPIRATION.
..GRAMS.. 04/28/2011
ATTN...WFO...AKQ...LWX...RAH...RNK...PBZ...RLX...GSP...
LAT...LON 38477738 35937907 35457995 36168176 37678099 39597910
39717770 39517700 39197686 38477738
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