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Tornado Watch 603
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WW0603 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Very Low
Severe Hail 2"+ Hail
Low Very 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
   TORNADO WATCH NUMBER 603
   NWS STORM PREDICTION CENTER NORMAN OK
   120 PM CDT SAT SEP 1 2012
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND SOUTHERN ILLINOIS
          WESTERN KENTUCKY
          SOUTHEAST MISSOURI
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 120 PM UNTIL
   1000 PM CDT.
   
   TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
   MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF
   SALEM ILLINOIS TO 35 MILES EAST SOUTHEAST OF POPLAR BLUFF
   MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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 602...
   
   DISCUSSION...WITH CONTINUED SFC HEATING...TSTMS SHOULD INCREASE IN
   STRENGTH ALONG EXISTING SQLN NOW EXTENDING FROM E OF ST LOUIS SSW
   INTO SE MO. OTHER STORMS MAY FORM AHEAD OF THIS LINE IN
   MOIST/CONFLUENT WARM SECTOR OVER SRN IL...AND POSSIBLY IN WAKE OF
   SQLN IN SE MO. DEVELOPMENT ALSO MAY BE FURTHERED IN TIME BY APPARENT
   VORT MAX MOVING AROUND SRN QUADRANT OF REMNANT CIRCULATION WITH
   FORMER HRCN ISAAC /ATTM CENTERED OVER CNTRL MO/.  
   
   WARM MID-LVL TEMPS MAY SOMEWHAT MITIGATE STORM STRENGTH AND/OR DELAY
   MORE ROBUST DEVELOPMENT. BUT GIVEN CURRENT INTENSITY
   TRENDS...AVAILABILITY OF RICH LOW-LVL MOISTURE...AND PRESENCE OF
   AMPLE DEEP SPEED/DIRECTIONAL SHEAR FOR BOTH SUPERCELLS AND LOW-LVL
   MESOS...SETUP MAY YIELD A COUPLE TORNADOES IN ADDITION TO SMALL BOWS
   WITH DMGG WIND THROUGH THIS EVE.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 21035.
   
   
   ...CORFIDI
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Page last modified: September 02, 2012
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