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Severe Thunderstorm Watch 253
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WW0253 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate 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.
   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 253
   NWS STORM PREDICTION CENTER NORMAN OK
   545 AM CDT WED MAY 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN ARKANSAS
          NORTHEAST LOUISIANA
          NORTHEAST INTO CENTRAL MISSISSIPPI
          FAR SOUTHERN MIDDLE TENNESSEE
   
   EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 545 AM UNTIL
   100 PM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES EAST
   NORTHEAST OF COLUMBUS MISSISSIPPI TO 30 MILES NORTHWEST OF MONROE
   LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.
   
   OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 248...TORNADO WATCH NUMBER 250.
   WATCH NUMBER 248 250 WILL NOT BE IN EFFECT AFTER 545 AM CDT.
   CONTINUE...WW 251...WW 252...
   
   DISCUSSION...LARGE LINEAR MCS WITH EMBEDDED BOWING SEGMENTS AND
   ISOLATED SUPERCELLS WILL CONTINUE MOVING SSEWD ACROSS WW THROUGH THE
   EARLY AFTERNOON...WITH STRONGEST EWD MOVING BOW SEGMENTS MOVING INTO
   AL AND ACROSS SRN MIDDLE TN THIS MORNING.  SHEAR WILL REMAIN VERY
   STRONG AND AN ALREADY MODERATELY UNSTABLE AIR MASS WILL FURTHER
   DESTABILIZE WITH AFTERNOON HEATING.  PRIMARY SEVERE THREAT WILL BE
   FROM DAMAGING WINDS AND ISOLATED LARGE HAIL.  HOWEVER...AT LEAST
   SOME TORNADO THREAT MAY EVOLVE AS CAP ERODES THROUGH THE MORNING
   ACROSS MS AND SHOULD STORMS BECOME DISCRETE AWAY FROM SURGING
   OUTFLOW BOUNDARY THEN PORTIONS OF THE WATCH MAY NEED TO BE REPLACED
   BY A TORNADO WATCH LATER TODAY.
   
   AVIATION...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 500. MEAN STORM
   MOTION VECTOR 28035.
   
   
   ...EVANS
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