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Severe Thunderstorm Watch 737
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WW0737 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate 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.
   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 737
   NWS STORM PREDICTION CENTER NORMAN OK
   155 PM MDT TUE SEP 8 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHEAST COLORADO
          A SMALL PART OF WESTERN MINNESOTA
          WESTERN AND NORTHERN NEBRASKA
          CENTRAL AND EASTERN SOUTH DAKOTA
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 155 PM UNTIL
   1000 PM MDT.
   
   HAIL TO 1.5 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 65
   STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST OF
   IMPERIAL NEBRASKA TO 50 MILES NORTHWEST OF ORTONVILLE MINNESOTA. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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.
   
   DISCUSSION...SFC-BASED TSTMS EXPECTED TO FORM ALONG SD/NEB COLD
   FRONT IN THE NEXT HOUR OR SO.  AT THE SAME TIME...MOUNTAIN-INITIATED
   STORMS NOW IN SE WY/N CNTRL CO EXPECTED TO MOVE/DEVELOP NEWD AND
   INTERACT WITH THE OVER SW NEB.  STG LOW-LVL INSTABILITY AND
   MODERATELY SHEARED WIND FIELD SUGGEST POTENTIAL FOR UPSCALE
   DEVELOPMENT INTO A LARGE E/SE MOVING CLUSTER OVER WRN NEB.  EMBEDDED
   STORMS WILL POSE A THREAT FOR SVR HAIL/WIND INTO TONIGHT.  FARTHER
   NE...STORMS/POSSIBLE SUPERCELLS WITH SMALL SCALE BOWS EXPECTED TO
   MOVE NEWD MORE OR LESS PARALLEL TO FRONT OVER SD.  THESE MAY YIELD
   SVR WIND/HAIL THROUGH EARLY TONIGHT.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 25030.
   
   
   ...CORFIDI
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