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Severe Thunderstorm Watch 722
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WW0722 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 722
   NWS STORM PREDICTION CENTER NORMAN OK
   310 PM CDT THU AUG 20 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EXTREME SOUTHWEST ARKANSAS
          EXTREME NORTHWEST LOUISIANA
          SOUTH CENTRAL AND SOUTHEAST OKLAHOMA
          NORTH CENTRAL AND NORTHEAST TEXAS
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 310 PM UNTIL
   1000 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 50
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH OF
   WICHITA FALLS TEXAS TO 25 MILES SOUTHEAST OF TEXARKANA ARKANSAS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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...CONTINUE...WW 721...
   
   DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN
   COVERAGE/INTENSITY ALONG AND IMMEDIATELY N OF AN OUTFLOW BOUNDARY
   NEAR THE RED RIVER...AS THE SRN PORTION OF A SHORTWAVE TROUGH
   ROTATING ESEWD OVER KS/OK BRUSHES THIS AREA.  STRONG INSTABILITY IS
   FOCUSED ALONG THE BOUNDARY...ALONG WITH SUFFICIENT VERTICAL SHEAR
   FOR SUPERCELLS IN THE ELY LOW-LEVEL FLOW N OF THE BOUNDARY.  LARGE
   HAIL AND DAMAGING WINDS SHOULD BE THE PRIMARY SEVERE STORM
   THREAT...THOUGH AN ISOLATED/BRIEF TORNADO CANNOT BE RULED OUT WITH
   SUPERCELLS TRACKING ALONG THE BOUNDARY.
   
   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 550. MEAN STORM
   MOTION VECTOR 29020.
   
   
   ...THOMPSON
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