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Tornado Watch 602
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WW0602 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Very Low
Severe Hail 2"+ Hail
Very 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.
   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 602
   NWS STORM PREDICTION CENTER NORMAN OK
   1245 PM CDT SAT SEP 1 2012
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL ILLINOIS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
   900 PM CDT.
   
   TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
   MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHWEST OF
   PEORIA ILLINOIS TO 20 MILES WEST SOUTHWEST OF MATTOON ILLINOIS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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.
   
   DISCUSSION...SCTD...SHALLOW...NARROW CONVECTIVE CELLS HAVE
   STRENGTHENED OVER CNTRL IL IN THE PAST 1-2 HRS. THIS ACTIVITY IS
   FORMING IN CONVERGENT...NRN PART OF WARM SECTOR ASSOCIATED WITH
   REMNANTS OF EX-HRCN ISAAC. AREA VWP DATA SUGGEST THAT LWR
   TROPOSPHERIC  SHEAR IS NOT FAVORABLE FOR SUSTAINED LOW-LVL
   MESOCYCLONES. HOWEVER...EVEN WITH MODEST SHEAR...PRESENCE OF
   NUMEROUS DISCRETE UPDRAFTS IN MOISTURE-RICH LOW-LVL ENVIRONMENT HAS
   PROVED FAVORABLE FOR AT LEAST BRIEF/WEAK
   TORNADOES/FUNNELS...ESPECIALLY ALONG WSW-ENE STNRY FRONT ACROSS NRN
   PART OF WW.
   
   GIVEN THAT ENVIRONMENT IS NOT LIKELY TO MARKEDLY CHANGE IN THE NEXT
   FEW HOURS...AND THAT LOW LVL BUOYANCY MAY BE BOOSTED BY ADDITIONAL
   SFC HEATING...THE THREAT FOR BRIEF/WEAK TORNADOES MAY CONTINUE. AT
   THE SAME TIME...A MORE SIGNIFICANT/LONGER-LASTING SVR THREAT MAY
   EVOLVE IN SRN PART OF WW AS CONTINUED DESTABILIZATION OCCURS AHEAD
   OF SHALLOW SQLN NOW IN W CNTRL/SW IL. AS THAT ACTIVITY STRENGTHENS
   IT MAY YIELD DMGG WIND FROM SMALL BOWING SEGMENTS...IN ADDITION TO A
   TORNADO OR TWO...LATER TODAY.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   450. MEAN STORM MOTION VECTOR 16030.
   
   
   ...CORFIDI
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Page last modified: September 02, 2012
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