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WWUS20 KWNS 061647

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 273

NWS STORM PREDICTION CENTER NORMAN OK

1240 PM EDT SUN JUN 6 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       MUCH OF MARYLAND

       NEW JERSEY

       NORTHERN AND CENTRAL VIRGINIA

       EASTERN PANHANDLE OF WEST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL

800 PM EDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE

MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHWEST OF

BALTIMORE MARYLAND TO 65 MILES SOUTHWEST OF PATUXENT RIVER

MARYLAND.  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 271...WW 272...



DISCUSSION...STORMS OVER THE HIGHER TERRAIN ARE EXPECTED TO SHIFT

EWD THROUGH THE AFTERNOON AND INTENSIFY AS THEY ENCOUNTER A VERY

WARM AND UNSTABLE ENVIRONMENT. DEEP WLY FLOW FROM 2-10 KM AGL WILL

BE FAVORABLE FOR ONE OR TWO LINES OF THUNDERSTORMS WITH WIND DAMAGE

TO DEVELOP. ALSO...THE PRESENCE OF STRONG DEEP LAYER SHEAR AND

STRONGLY VEERED WINDS IN THE LOWEST 1 TO 2 KM WILL SUPPORT EMBEDDED

SUPERCELLS WITHIN AND AHEAD OF THE LINE...WITH TORNADOES POSSIBLE.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 27030.





...IMY

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