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HAZARDOUS WEATHER OUTLOOK Date Issued: 447 AM CDT SUN JUL 6 2008 Expiration: 500 AM CDT MON JUL 07 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THERE WILL BE SCATTERED THUNDERSTORMS WEST OF THE MISSISSIPPI RIVER THIS MORNING. A MARGINALLY SEVERE THUNDERSTORM MAY PRODUCE HAIL UP TO PENNY SIZE. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM LATE THIS AFTERNOON THROUGH TONIGHT...MAINLY NORTHWEST OF A DUBUQUE TO MUSCATINE TO WASHINGTON LINE. THE MAIN THREAT WILL BE DAMAGING WIND GREATER THAN 60 MPH AND LARGE HAIL. TORRENTIAL RAINS OF UP TO 2 INCHES PER HOUR IS ALSO POSSIBLE WHICH WOULD CAUSE PONDING OF WATER IN LOW LYING AREAS. SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS NORTHEAST IOWA LATE THIS AFTERNOON AS A COLD FRONT APPROACHES FROM MINNESOTA. A MORE ORGANIZED THUNDERSTORM COMPLEX SHOULD SPREAD ACROSS MUCH OF THE OUTLOOK AREA TONIGHT...AS A STRENGTHENING LOW LEVEL JET IMPINGES ON THE SLOW MOVING COLD FRONT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY MUCH OF THE AREA NORTH OF HIGHWAY 34 IS OUTLOOKED FOR A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR MONDAY AFTERNOON AND MONDAY NIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG A STALLED FRONTAL BOUNDARY OVER CENTRAL AND NORTHEAST IOWA DURING THE AFTERNOON. THE THUNDERSTORMS WILL MOVE EAST INTO NORTHERN ILLINOIS DURING THE EVENING. THE PRIMARY SEVERE WEATHER RISK WILL BE DAMAGING WINDS AND LARGE HAIL. LOCALLY HEAVY RAINS WILL ALSO BE POSSIBLE...RESULTING IN LOCALIZED FLOODING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE AREA FOR TUESDAY AFTERNOON AND TUESDAY EVENING AS THE BOUNDARY MOVES SOUTH. THE PRIMARY SEVERE WEATHER RISK WILL BE DAMAGING WINDS. LOCALLY HEAVY RAINS WILL ALSO BE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT. |