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058 

WWUS20 KWNS 271615

SEL3

SPC WW 271615

DCZ000-DEZ000-MDZ000-NCZ000-NJZ000-VAZ000-CWZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 733

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM EDT WED OCT 27 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       EASTERN MARYLAND

       NORTH-CENTRAL NORTH CAROLINA

       SOUTHERN NEW JERSEY

       EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL

800 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES WEST SOUTHWEST OF

SOUTH HILL VIRGINIA TO 30 MILES NORTHWEST OF ATLANTIC CITY NEW

JERSEY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 732...



DISCUSSION...TSTMS DEVELOPING ALONG SURFACE FRONT OVER N-CNTRL VA

ARE EXPECTED TO EXPAND IN COVERAGE AND INTENSITY THIS AFTERNOON AS

WARM SECTOR AIR MASS CONTINUES TO DESTABILIZE.  REGIONAL VWP DATA

INDICATE THE PRESENCE OF MODERATELY STRONG LOW AND DEEP LAYER-SHEAR

WHICH SHOULD PERSIST THROUGH THE DIURNAL HEATING CYCLE OWING TO THE

PRESENCE OF A 40 KT SWLY LLJ.  AS SUCH...SETUP WILL FAVOR THE

DEVELOPMENT OF ORGANIZED STORMS INCLUDING SUPERCELLS AND BOWING

STRUCTURES WITH A RISK FOR DAMAGING WINDS AND A FEW 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 500.

MEAN STORM MOTION VECTOR 24035.





...MEAD

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