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Tornado Watch 257
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WW0257 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Very Low
Severe Hail 2"+ Hail
Low Very Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 257
   NWS STORM PREDICTION CENTER NORMAN OK
   820 PM EDT WED MAY 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN MARYLAND
          CENTRAL AND EASTERN NORTH CAROLINA
          CENTRAL AND EASTERN VIRGINIA
          COASTAL WATERS
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 820 PM
   UNTIL 400 AM EDT.
   
   TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
   MILES EITHER SIDE OF A LINE FROM 50 MILES SOUTH SOUTHWEST OF
   GREENSBORO NORTH CAROLINA TO 10 MILES NORTH OF WALLOPS VIRGINIA. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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 TORNADO
   WATCH NUMBER 256. WATCH NUMBER 256 WILL NOT BE IN EFFECT AFTER
   820 PM EDT. 
   
   DISCUSSION...ISOLD TO WIDELY SCTD TSTMS MAY CONTINUE TO FORM THROUGH
   LATER THIS EVENING INVOF SHALLOW WARM FRONT OVER S CNTRL VA...AND
   FARTHER S IN SLIGHTLY CONFLUENT WARM SECTOR ACROSS PIEDMONT NC. 
   ALTHOUGH LARGE SCALE FORCING FOR ASCENT WILL REMAIN MODEST PER
   SATELLITE AND EVE VWP DATA/...AND LOSS OF SFC HEATING WILL KEEP
   ADDITIONAL STORM DEVELOPMENT ISOLD TO WIDELY SCTD...PRESENCE OF
   MODERATE TO STRONG DEEP DIRECTIONAL SHEAR...AND ENHANCED LOW LVL
   SHEAR NEAR WARM FRONT ..SUGGEST POTENTIAL FOR ISOLD TORNADOES WITH
   ANY LONGER-LIVED UPDRAFTS AS TEMPERATURE-DEW POINT SPREADS DECREASE.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
   MEAN STORM MOTION VECTOR 23035.
   
   
   ...CORFIDI
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