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Severe Thunderstorm Watch 167
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WW0167 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
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.
   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 167
   NWS STORM PREDICTION CENTER NORMAN OK
   305 PM MDT FRI MAY 17 2013
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   
   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     NORTHWEST NEBRASKA INCLUDING THE NORTHERN PANHANDLE
     WESTERN SOUTH DAKOTA
     NORTHEAST WYOMING
   
   * EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 305 PM UNTIL
     1000 PM MDT.
   
   * PRIMARY THREATS INCLUDE...
     SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
       INCHES IN DIAMETER POSSIBLE
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES SOUTHEAST OF
   CHADRON NEBRASKA TO 75 MILES NORTH NORTHWEST OF RAPID CITY SOUTH
   DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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.
   
   &&
   
   OTHER WATCH INFORMATION...CONTINUE...WW 166...
   
   DISCUSSION...SEVERAL CLUSTERS OF STORMS HAVE DEVELOPED OVER THE NEB
   PANHANDLE AND NEAR THE BLACK HILLS OF SD...WITH VISIBLE IMAGERY
   SHOWING THICKENING CU OVER PARTS OF NERN WY.  CONVECTION IS EXPECTED
   TO INCREASE IN COVERAGE THROUGH THE EVENING WITHIN AN ENVIRONMENT
   CHARACTERIZED BY MODERATE INSTABILITY /MLCAPE OF 1000-2000 J PER KG/
   AND DEEP LAYER SHEAR OF 40-45 KT.  THIS WILL FAVOR POSSIBLE
   SUPERCELLS INITIALLY...ALTHOUGH ACTIVITY MAY GROW UPSCALE THIS
   EVENING IN RESPONSE TO AN INCREASING LOW LEVEL JET OVER THE PLAINS. 
   LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY THREATS.
   
   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 500. MEAN STORM
   MOTION VECTOR 24030.
   
   
   ...WEISS
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