SEL1
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 841
   NWS STORM PREDICTION CENTER NORMAN OK
   350 PM CST SAT NOV 5 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN AND PART OF CENTRAL ILLINOIS
          CENTRAL AND EASTERN MISSOURI
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
   1000 PM CST.
   
   TORNADOES...HAIL TO 2 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 85 STATUTE MILES
   EAST AND WEST OF A LINE FROM 30 MILES SOUTHWEST OF VICHY MISSOURI
   TO 55 MILES NORTH NORTHEAST OF QUINCY ILLINOIS.  FOR A COMPLETE
   DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
   (WOUS64 KWNS WOU1).
   
   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...POTENT SHORTWAVE TROUGH NOW MOVING ACROSS KS WILL
   LIKELY SUPPORT INCREASED SEVERE THUNDERSTORMS OVER WW THIS EVENING
   AS AIR MASS REMAINS MARGINAL TO MODERATELY UNSTABLE.  INITIATION
   WILL LIKELY OCCUR NEAR LOW CENTER EXPECTED TO DEEPEN INTO NERN MO
   THIS EVENING AND NEAR EWD MOVING SURFACE COLD FRONT.  PRIMARY SEVERE
   THREATS WILL BE DAMAGING WINDS AND LARGE HAIL AS STORMS EVOLVE INTO
   A SQUALL LINE. HOWEVER...SIGNIFICANT SHEAR AND BACKED SURFACE WINDS
   NEAR THE LOW CENTER WILL ALSO SUPPORT A THREAT OF A FEW TORNADOES
   WITH ANY SUPERCELLS/LEWP STRUCTURES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
   MEAN STORM MOTION VECTOR 25035.
   
   
   ...EVANS