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Severe Thunderstorm Watch 318
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WW0318 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.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 318
   NWS STORM PREDICTION CENTER NORMAN OK
   345 PM CDT SAT MAY 21 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTH-CENTRAL AND NORTHEAST KANSAS
          CENTRAL NEBRASKA
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
   1100 PM CDT.
   
   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 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES EAST
   NORTHEAST OF TOPEKA KANSAS TO 25 MILES NORTH NORTHWEST OF RUSSELL
   KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
   WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 316...WW 317...
   
   DISCUSSION...HIGH-BASED TSTMS ONGOING OVER CNTRL NEB INTO N-CNTRL KS
   ARE EXPECTED TO INTENSIFY AS THEY ENCOUNTER AN INCREASING MOIST AND
   UNSTABLE AIR MASS WHERE MLCAPE HAS INCREASED TO 2000-2500 J/KG. 
   ADDITIONAL STORM DEVELOPMENT WILL BE POSSIBLE LATE THIS AFTERNOON
   FROM VICINITY OF SURFACE LOW NEAR SLN SWD ALONG DRYLINE AS CAP IS
   GRADUALLY ERODED.  AREA PROFILER/VAD DATA SHOW VERTICALLY VEERING
   WIND PROFILES WITH 35-40 KT OF DEEP-LAYER SHEAR WHICH WILL BE
   SUPPORTIVE OF SUPERCELLS CAPABLE OF MAINLY LARGE HAIL AND DAMAGING
   WIND GUSTS.
   
   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 26025.
   
   
   ...MEAD
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