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Tornado Watch 231
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WW0231 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood High Moderate
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High High

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
   TORNADO WATCH NUMBER 231
   NWS STORM PREDICTION CENTER NORMAN OK
   450 PM CDT MON MAY 27 2013

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * TORNADO WATCH FOR PORTIONS OF 
     NORTHERN KANSAS
     SOUTHERN NEBRASKA

   * EFFECTIVE THIS MONDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CDT.

   * PRIMARY THREATS INCLUDE...
     NUMEROUS TORNADOES LIKELY WITH SEVERAL INTENSE TORNADOES
       POSSIBLE
     NUMEROUS VERY LARGE HAIL EVENTS TO 4 INCHES IN DIAMETER LIKELY
     SEVERAL SIGNIFICANT DAMAGING WIND GUSTS TO 80 MPH POSSIBLE

   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 120 STATUTE
   MILES EAST AND WEST OF A LINE FROM 20 MILES WEST NORTHWEST OF
   HASTINGS NEBRASKA TO 55 MILES SOUTHWEST OF CONCORDIA KANSAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU1).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   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 227...WW 228...WW
   229...WW 230...

   DISCUSSION...RAPID SUPERCELL DEVELOPMENT IS UNDERWAY IN A ZONE OF
   LOW-LEVEL WAA ACROSS S CENTRAL NEB...AND ADDITIONAL SUPERCELLS
   SHOULD FORM JUST NE OF THE TRIPLE POINT IN N CENTRAL KS WHERE
   LOW-LEVEL CONVERGENCE IS MAXIMIZED ALONG THE INSTABILITY AXIS...AS
   CONVECTIVE INHIBITION WEAKENS.  THE COMBINATION OF MLCAPE OF
   3500-4500 J/KG...EFFECTIVE BULK SHEAR OF 40-50 KT...EFFECTIVE SRH OF
   250-400 M2/S2...AND BOUNDARY LAYER DEWPOINTS IN THE UPPER 60S WILL
   SUPPORT THE RISK OF A FEW STRONG TORNADOES AND VERY LARGE HAIL. 
   LATER THIS EVENING INTO TONIGHT...THE STORMS WILL LIKELY CONGEAL
   INTO AN MCS AND MOVE EWD/ESEWD ALONG THE RESIDUAL OUTFLOW/WARM FRONT
   INTO NE KS/SE NEB.

   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   600. MEAN STORM MOTION VECTOR 27020.


   ...THOMPSON
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