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Tornado Watch 313
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WW0313 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate 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.
   SEL3

   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 313
   NWS STORM PREDICTION CENTER NORMAN OK
   340 PM CDT FRI JUN 14 2013

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * TORNADO WATCH FOR PORTIONS OF 
     EXTREME WESTERN IOWA
     EASTERN NEBRASKA

   * EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 340 PM UNTIL
     1000 PM CDT.

   * PRIMARY THREATS INCLUDE...
     SEVERAL TORNADOES POSSIBLE
     SEVERAL VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER
       POSSIBLE
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF
   NORFOLK NEBRASKA TO 25 MILES SOUTHEAST OF LINCOLN NEBRASKA.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU3).

   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 312...

   DISCUSSION...THUNDERSTORMS IN S CENTRAL NEB WILL CONTINUE TO SPREAD
   NEWD TOWARD NE NEB THIS AFTERNOON...WHERE ADDITIONAL SURFACE-BASED
   DEVELOPMENT WILL BE POSSIBLE NEAR THE TRIPLE POINT.  THE ENVIRONMENT
   FROM THE TRIPLE POINT SEWD ACROSS ERN NEB IS CHARACTERIZED BY
   BOUNDARY LAYER DEWPOINTS NEAR 70 F AND SURFACE TEMPERATURES
   APPROACHING 90 F FROM THE SW...WHICH WILL CONTINUE TO WEAKEN
   CONVECTIVE INHIBITION AND SUPPORT NEW STORM DEVELOPMENT. 
   MEANWHILE...THE OAX VWP SHOWS A RELATIVELY LARGE CLOCKWISE TURNING
   HODOGRAPH...WITH SUFFICIENT VERTICAL SHEAR FOR SUPERCELLS.  GIVEN
   EFFECTIVE SRH NEAR 300 M2/S2...MLCAPE OF 3000-4000 J/KG...AND MLLCL
   HEIGHTS NEAR 1250 M...A FEW TORNADOES AND ISOLATED VERY LARGE HAIL
   WILL BE POSSIBLE WITH THE INITIALLY MORE DISCRETE STORMS.  LATER
   THIS EVENING...SOME UPSCALE GROWTH IS EXPECTED INTO A SMALL
   SEWD-MOVING MCS...WITH AN ATTENDANT RISK FOR DAMAGING GUSTS.

   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 27020.


   ...THOMPSON
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