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Tornado Watch 648
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WW0648 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Low 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.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 648
   NWS STORM PREDICTION CENTER NORMAN OK
   540 PM CDT WED SEP 8 2010
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHWEST ARKANSAS
          SOUTHERN AND EASTERN OKLAHOMA
          CENTRAL AND NORTHERN TEXAS
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 540
   PM UNTIL 100 AM CDT.
   
   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 80 STATUTE
   MILES EAST AND WEST OF A LINE FROM 5 MILES NORTHEAST OF MCALESTER
   OKLAHOMA TO 25 MILES SOUTH SOUTHEAST OF CORSICANA TEXAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU8).
   
   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.
   
   DISCUSSION...SEVERAL SMALLER SCALE AREAS WITHIN LARGER SCALE REMNANT
   CIRCULATION OF "HERMINE" APPEAR TO HAVE THE POTENTIAL FOR MAINLY
   BRIEF TORNADOES THIS EVE: (1) ALONG LOW LVL CONFLUENCE AXIS IN ZONE
   OF GREATEST LOW LVL THETA-E ALONG AND E OF I-35 IN N TX...(2) ALONG
   BAND OF STORMS EMBEDDED IN WARM/MOISTURE-RICH AIR IN NE TX;
   OUTFLOW-DOMINANT STORM LINE MOVING NWD FROM SHV AREA MAY COMPROMISE
   PROBABILITIES FOR LOW LVL STORM ROTATION INITIALLY...BUT AREA WILL
   HAVE BENEFIT OF LOW LVL JET SHIFTING NNE INTO SE OK LATER THIS
   EVE...(3) AREA ALONG W-E WARM FRONT IN SW AR...WHERE DEEP SHEAR IS
   WEAKER BUT ENHANCED LOW LVL DIRECTIONAL SHEAR EXISTS...AND (4) AREA
   OF COMPARATIVELY LOWER THETA-E AIR NEAR LOW LVL MAIN CIRCULATION
   CENTER IN NW TX/SW OK; ANY THREAT THAT DOES DEVELOP IN THIS REGION
   SHOULD TO SHIFT ENE FROM TOWARD ADA LATER THIS EVE.
   
   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 450.
   MEAN STORM MOTION VECTOR 21030.
   
   
   ...CORFIDI
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