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WWUS20 KWNS 011824

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ILZ000-KYZ000-MOZ000-020300-



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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