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WWUS20 KWNS 050619

SEL1

SPC WW 050619

DCZ000-DEZ000-MDZ000-NCZ000-VAZ000-CWZ000-051400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 101

NWS STORM PREDICTION CENTER NORMAN OK

220 AM EDT TUE APR 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       EASTERN MARYLAND

       NORTHERN NORTH CAROLINA

       VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING FROM 220 AM UNTIL 1000 AM EDT.



TORNADOES...HAIL TO 0.5 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM ROANOKE RAPIDS NORTH CAROLINA

TO 35 MILES NORTH NORTHEAST OF BALTIMORE MARYLAND.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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...THIS TORNADO WATCH REPLACES SEVERE

THUNDERSTORM WATCH NUMBER 99. WATCH NUMBER 99 WILL NOT BE IN

EFFECT AFTER 220 AM EDT. CONTINUE...WW 97...WW 98...WW 100...



DISCUSSION...BROKEN BAND OF TSTMS EMERGING FROM THE BLUE RIDGE WILL

CONTINUE TO EXHIBIT SUPERCELL AND LEWP CHARACTERISTICS AS IT RACES

NEWD ACROSS THE WW AREA EARLY THIS MORNING.  IN ADDITION TO THE

THREAT FOR DAMAGING WINDS...TORNADO POTENTIAL WILL BE ENHANCED BY

AMBIENT STRONG LOW-LEVEL SHEAR AND INTERACTION OF CONVECTIVE BAND

WITH OUTFLOW BOUNDARY RETREATING NWD THROUGH THE REGION.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

350. MEAN STORM MOTION VECTOR 25050.





...MEAD

