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Tornado Watch 312
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WW0312 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 312
   NWS STORM PREDICTION CENTER NORMAN OK
   1205 PM MDT THU MAY 31 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN COLORADO
          WESTERN KANSAS
          SOUTHWEST NEBRASKA
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1205 PM UNTIL
   700 PM MDT.
   
   TORNADOES...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 135 STATUTE
   MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHEAST OF IMPERIAL
   NEBRASKA TO 75 MILES SOUTH SOUTHEAST OF BURLINGTON COLORADO.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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...STRONG/SEVERE STORMS CONTINUE IN ALLEY OF FAVORABLE
   MOISTURE CONVERGENCE AS A MID/UPPER LEVEL SHORTWAVE TROUGH BEGINS TO
   MOVE SEWD FROM SERN WY.  AIR MASS CONTINUES TO DESTABILIZE AS MUCAPE
   VALUES ARE BETWEEN 100-2000 J/KG.  DEEP LAYER IS ALSO ON THE
   INCREASE AT 50-60 KT FROM CENTRAL CO INTO W CENTRAL KS JUST AHEAD OF
   MID LEVEL JET EXIT REGION.  EXPECT MORE STORM DEVELOPMENT NEXT
   SEVERAL HOURS ACROSS THIS AREA AHEAD OF SHORTWAVE TROUGH/MID LEVEL
   JET EXIT REGION AS AIR MASS CONTINUES TO DESTABILIZE AND LOW LEVEL
   JET BECOMES MORE DEFINED BETWEEN NOW AND 00Z.
   
   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 27030.
   
   
   ...MCCARTHY
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