SEVERE THUNDERSTORM WATCH NUMBER 124

URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 124
   NWS STORM PREDICTION CENTER NORMAN OK
   925 PM CDT SAT MAR 31 2012
  
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  
          EAST CENTRAL IOWA
          NORTHWEST ILLINOIS
  
   EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 925 PM
   UNTIL 400 AM CDT.
  
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
  
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTHWEST OF
   CEDAR RAPIDS IOWA TO 5 MILES EAST NORTHEAST OF MARSEILLES
   ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
  
   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.
  
   OTHER WATCH INFORMATION...CONTINUE...WW 123...
  
   DISCUSSION...AREA OF TSTMS RELATED TO LOW-LEVEL WAA WILL SPREAD
   EWD/ESEWD FROM ERN IA INTO NW IL OVERNIGHT.  A FEED OF MUCAPE
   APPROACHING 1000 J/KG AND SUBSTANTIAL CLOUD-LAYER VERTICAL SHEAR
   WILL SUPPORT ORGANIZED STORMS AND POTENTIALLY AN ELEVATED SUPERCELL
   OR TWO...WITH AN ATTENDANT RISK FOR AT LEAST ISOLATED LARGE HAIL.
  
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 29030.