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Severe Thunderstorm Watch 435
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WW0435 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL5

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 435
   NWS STORM PREDICTION CENTER NORMAN OK
   415 PM MDT TUE AUG 9 2016

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     SOUTHEAST MONTANA
     SOUTHWEST NORTH DAKOTA
     WESTERN AND CENTRAL SOUTH DAKOTA
     NORTHEAST WYOMING

   * EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 415 PM UNTIL
     1100 PM MDT.

   * PRIMARY THREATS INCLUDE...
     SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3.5
       INCHES IN DIAMETER POSSIBLE
     ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 80 MPH POSSIBLE
     A TORNADO OR TWO POSSIBLE

   SUMMARY...IN AN ENVIRONMENT CHARACTERIZED BY STRONG SHEAR AND
   MODERATE TO STRONG INSTABILITY...INITIAL HIGH-BASED SUPERCELLS WILL
   SPREAD FROM FAR EASTERN WYOMING AND SOUTHEAST MONTANA INTO SOUTH
   DAKOTA AND SOUTHWEST NORTH DAKOTA. VERY LARGE HAIL WILL BE POSSIBLE
   ASIDE FROM THE POSSIBILITY OF A TORNADO. STORMS MAY EVENTUALLY
   CLUSTER THIS EVENING WITH AN INCREASING POTENTIAL FOR DAMAGING WINDS
   ACROSS SOUTH DAKOTA AND SOUTHERN NORTH DAKOTA.

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH
   SOUTHWEST OF BROADUS MONTANA TO 30 MILES NORTH OF PIERRE SOUTH
   DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   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.

   &&

   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
   MOTION VECTOR 25025.


   ...GUYER
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Page last modified: August 10, 2016
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