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Tornado Watch 90
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WW0090 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood High Moderate
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.
   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 90
   NWS STORM PREDICTION CENTER NORMAN OK
   150 PM CDT WED APR 10 2013
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN ILLINOIS
          SOUTH CENTRAL AND SOUTHEAST MISSOURI
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 150 PM UNTIL
   900 PM CDT.
   
   TORNADOES...HAIL TO 2.5 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 80 STATUTE
   MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF SCOTT
   AFB ILLINOIS TO 35 MILES EAST SOUTHEAST OF WEST PLAINS MISSOURI. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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 88...WW 89...
   
   DISCUSSION...SURFACE HEATING/DESTABILIZATION ACROSS SRN/ERN MO IS
   CONTRIBUTING TO MODERATE INSTABILITY IN THE WARM SECTOR...WITH A
   WEAKENING CAP AND INCREASING PROBABILITY FOR THUNDERSTORM INITIATION
   IN THE NEXT COUPLE OF HOURS.  GIVEN THE MODERATE INSTABILITY AND MID
   60S BOUNDARY LAYER DEWPOINTS...AN INCREASE IN VERTICAL SHEAR
   /ALREADY NOTED IN THE VWP FROM SAINT LOUIS/ WILL RESULT IN AN
   INCREASING RISK FOR SUPERCELLS WITH TORNADOES AND LARGE HAIL.  LATER
   THIS AFTERNOON/EVENING...CONVECTION SHOULD EVOLVE INTO MORE OF A
   LINE ALONG THE COLD FRONT IN MO...WITH A CONTINUED RISK FOR EMBEDDED
   CIRCULATIONS AND DAMAGING WINDS.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 23040.
   
   
   ...THOMPSON
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