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Severe Thunderstorm Watch 219
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WW0219 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Low 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.
   SEL9
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 219
   NWS STORM PREDICTION CENTER NORMAN OK
   1245 AM CDT FRI MAY 1 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EXTREME NORTHWESTERN ARKANSAS
          FAR SOUTHEASTERN KANSAS
          SOUTHWESTERN MISSOURI
          CENTRAL AND NORTHEASTERN OKLAHOMA
   
   EFFECTIVE THIS FRIDAY MORNING FROM 1245 AM UNTIL 700 AM CDT.
   
   HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTHEAST
   OF FAYETTEVILLE ARKANSAS TO 30 MILES NORTH NORTHWEST OF OKLAHOMA
   CITY OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
   
   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 218...
   
   DISCUSSION...SUPERCELLS IN CENTRAL OK ARE EXPECTED TO CONTINUE THE
   COUPLE OF HOURS AND THEN GRADUALLY WEAKEN. HOWEVER...OTHER STORMS
   ARE EXPECTED TO REDEVELOP ACROSS THE WATCH AREA THROUGH THE EARLY
   MORNING HOURS AS LOW LEVEL JET STRENGTHENS/VEERS AND IMPINGES ON
   WEAK BOUNDARY...STRETCHING SEWD FROM NORTH CENTRAL INTO EAST CENTRAL
   OK. MUCAPES AOA 2000 J/KG AND EFFECTIVE SHEAR AT 40-50 KT WILL BE
   SUPPORTIVE OF ROTATING STORMS. HOWEVER...A SLOWLY STABILIZING
   BOUNDARY LAYER SUGGESTS LARGE HAIL SHOULD BE THE PRIMARY THREAT.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 29025.
   
   
   ...IMY
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