Iowa counties: MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE….1130 AM CDT TUE JUN 3 2014

THIS AFTERNOON AND TONIGHT:  SEVERE THUNDERSTORMS PRODUCING DAMAGING WINDS…LARGE HAIL AND VERY HEAVY RAIN WILL LIKELY DEVELOP OVER THE AREA THROUGH THIS AFTERNOON. LONG TRACK TORNADOES…VERY LARGE HAIL ARE ALSO POSSIBLE AS A SIGNIFICANT SEVERE WEATHER OUTBREAK MOVES ACROSS THE REGION.

LARGE HAIL PRODUCING THUNDERSTORMS WILL LIKELY MOVE INTO NORTHEAST NEBRASKA THROUGH MID AFTERNOON…WITH DAMAGING WINDS AND VERY HEAVY RAIN ALSO EXPECTED. THESE STORMS COULD MOVE TOWARD EAST CENTRAL NEBRASKA AND WESTERN IOWA THROUGH MID TO LATE AFTERNOON.

LATER THIS AFTERNOON…A WARM FRONT IS FORECAST TO EXTEND FROM NORTHWEST TO SOUTHEAST FROM NEAR LINCOLN TOWARD FAR SOUTHWEST IOWA. SUPERCELL THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND NORTH OF THIS FRONT AND QUICKLY BECOME SEVERE. TORNADOES AND LARGE HAIL WILL BE THE PRIMARY HAZARD INITIALLY. THUNDERSTORMS ARE EXPECTED TO BECOME MORE WIDESPREAD INTO THE EARLY EVENING HOURS…AND EVENTUALLY DEVELOP INTO A LINE OF THUNDERSTORMS. THIS LINE WILL BE CAPABLE OF PRODUCING DAMAGING WIND AND LARGE HAIL…IN ADDITION TO HEAVY RAINFALL.

A FLASH FLOOD WATCH HAS BEEN ISSUED FOR MUCH OF SOUTHWESTERN IOWA THIS EVENING AND OVERNIGHT. WIDESPREAD RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE THROUGH TONIGHT.

HEAVY RAIN OVER MUCH OF THE REGION LATER THIS AFTERNOON THROUGH EARLY TONIGHT WILL ALSO LIKELY PRODUCE SOME STREAM AND RIVER FLOODING LATER TONIGHT INTO WEDNESDAY.