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Particularly Dangerous Situation (PDS) Tornado Watch 37
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   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 37
   NWS STORM PREDICTION CENTER NORMAN OK
   310 PM CST TUE FEB 5 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN ARKANSAS
          SOUTHERN ILLINOIS
          SOUTHWEST INDIANA
          WESTERN KENTUCKY
          SOUTHEAST MISSOURI
          CENTRAL AND NORTHERN MISSISSIPPI
          WESTERN TENNESSEE
   
   EFFECTIVE THIS TUESDAY AFTERNOON FROM 310 PM UNTIL MIDNIGHT CST.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER...
   THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE
   POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
   MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF CAPE
   GIRARDEAU MISSOURI TO 25 MILES EAST OF JACKSON MISSISSIPPI.  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...CONTINUE...WW 34...WW 35...WW 36...
   
   DISCUSSION...COMPLEX SITUATION EVOLVING THIS AFTERNOON WITH
   SCATTERED THUNDERSTORMS DEVELOPING IN THE OPEN WARM SECTOR FROM MS
   NWD INTO WRN TN/KY.  ADDITIONAL SEVERE STORMS WILL MOVE INTO NW MS
   FROM AR/LA...AND INTO TN/KY/IL/INDIANA FROM THE W BY EARLY TONIGHT
   IN ASSOCIATION WITH THE PRIMARY SYNOPTIC SYSTEM NOW LOCATED FARTHER
   TO THE W.  MODERATE INSTABILITY AND BOUNDARY LAYER DEWPOINTS IN THE
   60S COVER A WIDE AREA...WHILE LOCAL VWP/S AND FORECAST SOUNDINGS
   SHOW STRONG VERTICAL SHEAR OVER THE MAJORITY OF THE WARM SECTOR. 
   THE NET RESULT WILL BE A THREAT FOR SCATTERED TORNADIC SUPERCELLS
   THROUGH THE AFTERNOON...FOLLOWED BY SUPERCELLS/BOW ECHOES WITH THE
   LATER CONVECTION TONIGHT.  A FEW STRONG TORNADOES AND LARGE HAIL
   WILL BE THE MAIN SEVERE THREATS THIS AFTERNOON...WHILE THE DAMAGING
   WIND THREAT WILL INCREASE AS WELL INTO TONIGHT AS THE MORE
   WIDESPREAD CONVECTION MOVES E OF THE MS RIVER.
   
   AVIATION...TORNADOES AND 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
   450. MEAN STORM MOTION VECTOR 23050.
   
   
   ...THOMPSON
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