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Tornado Watch 334
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WW0334 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate 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.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 334
   NWS STORM PREDICTION CENTER NORMAN OK
   825 PM CDT SUN MAY 22 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND SOUTHWEST ILLINOIS
          EASTERN AND SOUTHERN MISSOURI
   
   EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 825 PM UNTIL
   400 AM CDT.
   
   TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
   MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF CHAMPAIGN
   ILLINOIS TO 45 MILES WEST SOUTHWEST OF WEST PLAINS MISSOURI.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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 323...WW 325...WW
   326...WW 327...WW 329...WW 330...WW 332...WW 333...
   
   DISCUSSION...EARLIER SUPERCELLS ARE NOW MERGING INTO TWO MCS/S...ONE
   NEAR STL...AND ANOTHER ALONG THE SW MO/NW AR BORDER.  MODERATE
   INSTABILITY IS STILL PRESENT IN A CORRIDOR IN ADVANCE OF THIS
   CONVECTION...W OF A MORE STABLE AIR MASS OVER SRN IL/WRN KY.  GIVEN
   THE ORGANIZED CONVECTIVE STRUCTURES...INCLUDING BOWS AND
   SUPERCELLS...AND SUFFICIENT LOW-LEVEL AND DEEP-LAYER SHEAR TO
   MAINTAIN THESE STORM TYPES...A RISK FOR TORNADOES...DAMAGING
   WINDS...AND LARGE HAIL WILL PERSIST.  THE MORE PERSISTENT TORNADO
   THREAT IS EXPECTED ACROSS SRN MO INVOF OF A RETREATING OUTFLOW
   BOUNDARY NEAR THE MO/AR BORDER.
   
   AVIATION...TORNADOES AND 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
   550. MEAN STORM MOTION VECTOR 28035.
   
   
   ...THOMPSON
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