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Severe Thunderstorm Watch 701
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WW0701 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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.
   SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 701
   NWS STORM PREDICTION CENTER NORMAN OK
   400 PM MDT THU AUG 13 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL MONTANA
          NORTH CENTRAL WYOMING
   
   EFFECTIVE THIS THURSDAY AFTERNOON FROM 400 PM UNTIL MIDNIGHT MDT.
   
   HAIL TO 2 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 105
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES NORTH
   NORTHWEST OF BUTTE MONTANA TO 65 MILES NORTH NORTHEAST OF
   BILLINGS MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
   
   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...THUNDERSTORMS CONTINUE TO DEVELOP ACROSS WESTERN MT
   AHEAD OF AN APPROACHING UPPER TROUGH.  THESE STORMS ARE EXPECTED TO
   INCREASE IN COVERAGE THIS EVENING WITH SCATTERED STORMS BECOMING
   LOCALLY SEVERE.  40-50 KNOTS OF EFFECTIVE SHEAR AND
   NORTHEASTERLY/UPSLOPE LOW LEVEL WINDS SUGGEST THAT A FEW SUPERCELLS
   ARE POSSIBLE CAPABLE OF DAMAGING WINDS AND LARGE HAIL.
   
   AVIATION...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 25035.
   
   
   ...HART
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Page last modified: August 14, 2009
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