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Severe Thunderstorm Watch 546
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WW0546 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 546
   NWS STORM PREDICTION CENTER NORMAN OK
   1245 PM CDT SAT JUL 4 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHWEST AND SOUTH-CENTRAL OKLAHOMA
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
   800 PM CDT.
   
   HAIL TO 1.5 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 40
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES EAST
   NORTHEAST OF ARDMORE OKLAHOMA TO 45 MILES WEST NORTHWEST OF ALTUS
   OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
   
   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 545...
   
   DISCUSSION...VERY HOT AND UNSTABLE CONDITIONS /95-100F SFC TEMPS AND
   DCAPE TO 1500 J PER KG/ HAVE DEVELOPED ALONG AND SOUTH OF
   WELL-DEFINED MCS OUTFLOW SITUATED ACROSS SCNTRL OK ATTM. A FEW MORE
   HOURS OF HEATING ACROSS THE REGION WILL ESSENTIALLY REMOVE REMAINING
   CONVECTIVE INHIBITION AND LEAD TO AN INCREASING CHANCE FOR STORM
   DEVELOPMENT NEAR THE RESIDUAL BOUNDARY. DESPITE REACTIVELY WEAK
   MID-LEVEL FLOW AND EFFECTIVE SHEAR...BOUNDARY LAYER HEATING WILL
   CONTRIBUTE TO A DEEP AND NEARLY DRY ADIABATIC SUB-CLOUD LAYER THAT
   SHOULD SUPPORT STRONG TSTM DOWNDRAFTS CAPABLE OF PRODUCING WIND
   DAMAGE. RANDOM STORM/OUTFLOW INTERACTIONS MAY FURTHER ENHANCE TSTM
   ORGANIZATION AND PERSISTENCE INTO THE EVENING HOURS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 28015.
   
   
   ...CARBIN
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