

201 

WWUS20 KWNS 281840

SEL5

SPC WW 281840

MDZ000-NCZ000-VAZ000-CWZ000-290100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 255

NWS STORM PREDICTION CENTER NORMAN OK

240 PM EDT THU APR 28 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST MARYLAND

       EASTERN NORTH CAROLINA

       EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 240 PM UNTIL

900 PM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF

SALISBURY MARYLAND TO 30 MILES EAST SOUTHEAST OF JACKSONVILLE

NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



OTHER WATCH INFORMATION...CONTINUE...WW 251...WW 252...WW

253...WW 254...



DISCUSSION...SCATTERED THUNDERSTORMS PERSIST ACROSS PARTS OF EASTERN

NC AND SOUTHEAST VA WHERE MODERATE INSTABILITY PERSISTS.  LOW LEVEL

SHEAR HAS BEEN DIMINISHING WITH TIME...BUT REMAINS SUFFICIENT FOR A

FEW SUPERCELL STORMS CAPABLE OF DAMAGING WINDS AND ISOLATED

TORNADOES.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 24040.





...HART

