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Tornado Watch 733
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WW0733 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate 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.
   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 733
   NWS STORM PREDICTION CENTER NORMAN OK
   755 PM MDT SUN AUG 23 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN MONTANA
          WESTERN NORTH DAKOTA
          NORTHWEST SOUTH DAKOTA
   
   EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 755 PM UNTIL
   100 AM 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 105 STATUTE
   MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH NORTHWEST OF
   WILLISTON NORTH DAKOTA TO 30 MILES SOUTHWEST OF LEMMON SOUTH
   DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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 732...
   
   DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO INCREASE/DEVELOP OVER WW
   AREA THROUGH EARLY MON...IN ZONE OF INCREASING LOW LVL WAA/UPR
   DIVERGENCE DOWNSTREAM FROM SHORTWAVE IMPULSE NOW ENTERING WRN WY. 
   STORMS NOW OVER NE MT LIKELY ARE HIGH BASED.  THESE SHOULD DEVELOP
   DOWNWARD WITH TIME AS THEY ENCOUNTER MOISTENING ELY LOW LVL FLOW N
   OF SE MT SFC LOW.  OTHER STORMS...LIKELY MORE NEARLY
   SFC-BASED...SHOULD FORM SWD AND EWD INTO WRN ND...IN REGION OF
   GREATER LOW LVL SPEED/ DIRECTIONAL SHEAR.  WHILE LOW LVL CIN WILL BE
   A FACTOR OPPOSING A WIDESPREAD TORNADIC THREAT...ABSENCE OF STRONG
   LOW LVL LINEAR FORCING AND ENLARGED LOW LVL HODOGRAPHS WITH
   STRENGTHENING LLJ SUGGESTS POTENTIAL FOR ISOLD TORNADOES LATER THIS
   EVE/EARLY MON...IN ADDITION TO SVR HAIL AND WIND.
   
   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
   500. MEAN STORM MOTION VECTOR 24030.
   
   
   ...CORFIDI
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