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Severe Thunderstorm Watch 403
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WW0403 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate 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.
   SEL3
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 403...CORRECTED
   NWS STORM PREDICTION CENTER NORMAN OK
   835 PM CDT SAT JUN 16 2012
   
   REPLACEMENT INFORMATION ADDED...THIS WATCH REPLACES WATCH 401.
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL ILLINOIS
          EASTERN MISSOURI
   
   EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 835 PM
   UNTIL 200 AM CDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST
   OF SAINT LOUIS MISSOURI TO 30 MILES EAST NORTHEAST OF MATTOON
   ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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...THIS SEVERE THUNDERSTORM WATCH REPLACES
   SEVERE THUNDERSTORM WATCH NUMBER 401. WATCH NUMBER 401 WILL NOT
   BE IN EFFECT AFTER 835 PM CDT. CONTINUE...WW 402...
   
   DISCUSSION...LIFT ALONG LEADING EDGE OF MATURE MCS COLD POOL IS
   EXPECTED TO CONTINUE TO SUPPORT VIGOROUS DEEP CONVECTION SPREADING
   EAST ACROSS THE STL AREA AND INTO CNTRL IL THROUGH THE LATE EVENING.
   AIR MASS AHEAD OF THIS CONVECTION WARMED CONSIDERABLY THROUGH THE
   DAY WITH TEMPS IN MOST AREAS ONLY DROPPING UNDER 90F IN THE LAST
   HOUR. GIVEN THE ANTECEDENT STEEP LOW LEVEL LAPSE RATES AND
   SUBSTANTIAL PRECIPITATION ACCOMPANYING THE ADVANCING MCS...AT LEAST
   A LOCALIZED DAMAGING WIND THREAT SHOULD ENSUE AS STORMS SPREAD
   ACROSS THE REGION TONIGHT. MID LEVEL JET STREAK OF ABOUT 40-50 KT
   MAY ALSO AID OCCASIONALLY BETTER CELLULAR DEVELOPMENT...EITHER AHEAD
   OF OR EMBEDDED IN THE QLCS. WHEN COMBINED WITH POCKETS OF STEEPER
   MID LEVEL LAPSE RATES...THIS CONVECTION COULD POSE A THREAT OF
   ISOLATED LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 27035.
   
   
   ...CARBIN
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