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Tornado Watch 8
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WW0008 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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 8
   NWS STORM PREDICTION CENTER NORMAN OK
   405 PM MST THU JAN 21 2010
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          A LARGE PART OF SOUTHWEST AND SOUTH CENTRAL ARIZONA
          SMALL PART OF SOUTHEAST CALIFORNIA
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 405 PM UNTIL
   1000 PM MST.
   
   TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTHWEST OF BLYTHE
   CALIFORNIA TO 60 MILES SOUTH SOUTHEAST OF PHOENIX ARIZONA.  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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 7...
   
   DISCUSSION...A VERY STRONG/DEEP LOW PRESSURE MOVING INTO CA IS
   ACCOMPANIED BY 180KT POLAR JET MAX CROSSING NRN BAJA THIS EVENING. 
   THIS PLACES AN UNUSUALLY POTENT WIND PROFILE ACROSS THE WATCH AREA
   WHERE LOW LEVEL MOISTURE HAS SURGED NWD FROM THE GULF OF CA WITH
   DEWPOINTS NOW INTO THE UPPER 50S LWR CO RIVER VALLEY.
   
   A FORCED LINE ON LOW TOPPED THUNDERSTORMS IS DEVELOPING SERN CA AND
   WILL CONTINUE EWD ACROSS THE WATCH THRU THE EVENING.  IN ADDITION TO
   THE POTENTIAL FOR DAMAGING WINDS GIVEN THE INTENSITY OF THE LOW
   LEVEL JET...ISOLATED TORNADOES WILL ALSO BE POSSIBLE EMBEDDED WITHIN
   THE LINE AS LOW LEVEL SHEAR IS UPWARDS TO 50KTS AND LCL/S ARE
   FAVORABLY LOW.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   350. MEAN STORM MOTION VECTOR 23050.
   
   
   ...HALES
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Page last modified: January 22, 2010
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