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Severe Thunderstorm Watch 630
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WW0630 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
High Moderate
Severe Hail 2"+ Hail
Moderate 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.
   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 630
   NWS STORM PREDICTION CENTER NORMAN OK
   240 PM CDT FRI SEP 7 2012
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EXTREME NORTHWEST ARKANSAS
          PARTS OF SOUTHWEST ILLINOIS
          SOUTHEAST KANSAS
          MUCH OF CENTRAL AND SOUTHERN MISSOURI
          NORTHEAST OKLAHOMA
   
   EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL
   1000 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 75
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES SOUTH
   SOUTHWEST OF CHANUTE KANSAS TO 15 MILES EAST OF SCOTT AFB
   ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 628...WW 629...
   
   DISCUSSION...STORMS WILL LIKELY INCREASE IN COVERAGE/INTENSITY BOTH
   ALONG AND AHEAD OF A COLD FRONT IN THE NEXT FEW HOURS ACROSS SE
   KS/NE OK/MO.  INCREASING DEEP-LAYER VERTICAL SHEAR WILL THE APPROACH
   OF A MIDLEVEL TROUGH OVER KS...AS WELL AS A DEEP SURFACE-BASED MIXED
   LAYER AND MODERATE INSTABILITY...WILL SUPPORT AN INCREASING RISK FOR
   DAMAGING WINDS AND LARGE HAIL THROUGH THE AFTERNOON/EVENING.
   
   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 550. MEAN STORM
   MOTION VECTOR 29035.
   
   
   ...THOMPSON
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Page last modified: September 08, 2012
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