SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 185
   NWS STORM PREDICTION CENTER NORMAN OK
   520 PM CDT FRI APR 14 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EXTREME SOUTHEAST IOWA
          MUCH OF CENTRAL AND NORTHERN ILLINOIS
          EXTREME NORTHWEST INDIANA
          LAKE MICHIGAN
   
   EFFECTIVE THIS FRIDAY AFTERNOON FROM 520 PM UNTIL MIDNIGHT CDT.
   
   TORNADOES...HAIL TO 3 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 95 STATUTE
   MILES EAST AND WEST OF A LINE FROM 45 MILES WEST NORTHWEST OF
   MEIGS FIELD ILLINOIS TO 35 MILES SOUTH SOUTHEAST OF SPRINGFIELD
   ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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 184...
   
   DISCUSSION...LOW LEVELS ARE RECOVERING IN WAKE OF EARLIER CONVECTION
   ACROSS IL.  THUNDERSTORM DEVELOPMENT IS EXPECTED WITHIN THE NEXT 1-2
   HOURS ALONG A COLD FRONT CROSSING THE MS RIVER INTO NW IL...AND
   ALONG A RETREATING OUTFLOW BOUNDARY THAT EXTENDS NW-SE FROM NRN INTO
   E CENTRAL IL.  A FEED OF STRONG INSTABILITY FROM THE SW AND 0-6 KM
   BULK SHEAR IN EXCESS OF 40 KT WILL SUPPORT SUPERCELLS CAPABLE OF
   PRODUCING VERY LARGE HAIL AND DAMAGING WINDS.  ADDITIONALLY...A FEW
   TORNADOES MAY OCCUR WITH SUPERCELLS INVOF THE RETREATING OUTFLOW
   BOUNDARY WHERE LOW-LEVEL MOISTURE AND SHEAR ARE SOMEWHAT ENHANCED
   COMPARED TO THE OPEN WARM SECTOR ACROSS CENTRAL IL.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 28030.
   
   
   ...THOMPSON