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Severe Thunderstorm Watch 4
Initial RADAR image for Watch 4


Note: The WATCH PROBABILITY TABLES are non-operational and can only be viewed within noaa.gov.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 4
   NWS STORM PREDICTION CENTER NORMAN OK
   455 PM CST WED JAN 12 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL AND NORTHERN ILLINOIS
          LAKE MICHIGAN
   
   EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 455 PM UNTIL
   1000 PM CST.
   
   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 ALONG AND 55 STATUTE MILES
   EAST AND WEST OF A LINE FROM 35 MILES SOUTHEAST OF QUINCY ILLINOIS
   TO 25 MILES NORTHWEST OF MEIGS FIELD ILLINOIS.
   
   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 2...WW 3...
   
   DISCUSSION...LINE OF FAST MOVING THUNDERSTORMS OVER NORTHEAST MO
   WILL TRACK NORTHEASTWARD ACROSS CENTRAL/NORTHERN IL THIS EVENING. 
   DESPITE WEAK INSTABILITY...VERY STRONG WIND FIELDS AND FORCING ALONG
   FRONT MAY BE SUFFICIENT FOR A RISK OF ISOLATED DAMAGING WINDS AND
   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 500. MEAN STORM
   MOTION VECTOR 23045.
   
   
   ...HART
   
   
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