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869 

WWUS20 KWNS 201849

SEL8

SPC WW 201849

MDZ000-NCZ000-VAZ000-CWZ000-210200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 178

NWS STORM PREDICTION CENTER NORMAN OK

250 PM EDT MON APR 20 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST MARYLAND

       NORTHERN NORTH CAROLINA

       CENTRAL AND EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 250 PM UNTIL

1000 PM EDT.



TORNADOES...HAIL TO 2 INCHES 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 NORTH AND SOUTH OF A LINE FROM 20 MILES WEST OF DANVILLE

VIRGINIA TO 50 MILES SOUTHEAST OF PATUXENT RIVER MARYLAND.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...THUNDERSTORMS ARE FORECAST TO INTENSIFY THIS AFTERNOON

OVER NORTHERN NC AND CENTRAL VA...AHEAD OF APPROACHING SURFACE LOW.

ACTIVITY WILL SPREAD NORTHEASTWARD ACROSS THE WATCH AREA POSING A

RISK OF LARGE HAIL AND DAMAGING WINDS.  ENHANCED FORCING NEAR THE

WARM FRONT MAY ALSO POSE A RISK OF A FEW TORNADOES THIS AFTERNOON

AND EARLY EVENING.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 24030.





...HART

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