Hazardous Weather Outlook for parts of western/southwest IA 9/7/15
September 7th, 2015 by Ric Hanson
HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE COUNTIES…
500 AM CDT MON SEP 7 2015
TODAY AND TONIGHT: SEVERE THUNDERSTORMS PRODUCING LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE LATER THIS AFTERNOON AND EVENING. HEAVY RAIN IS LIKELY OVERNIGHT…WITH FLASH FLOODING POSSIBLE. A FLASH FLOOD WATCH IS POSTED.
THE COLD FRONT THAT MOVED THROUGH THE AREA AND TRIGGERED
THUNDERSTORMS SUNDAY NIGHT IS FORECAST TO LIFT BACK NORTH INTO
SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATER TODAY AND TONIGHT. HIGH INSTABILITY AND MODERATE SHEAR WILL CONTRIBUTE TO THE SEVERE STORM POTENTIAL DURING THE LATE AFTERNOON AND EVENING. ALSO…ABUNDANT ATMOSPHERIC MOISTURE COMBINED WITH EXPECTED TRAINING OF THUNDERSTORMS OVERNIGHT WILL LEAD TO HEAVY RAINFALL AND FLASH FLOODING…ESPECIALLY IN AREAS THAT RECEIVED HEAVY RAIN SUNDAY NIGHT.
TUESDAY THROUGH SUNDAY: THERE IS A CHANCE FOR THUNDERSTORMS ON TUESDAY AS AN UPPER LEVEL LOW PRESSURE SYSTEM MOVES THROUGH THE AREA. ISOLATED THUNDERSTORMS ARE AGAIN POSSIBLE TUESDAY NIGHT THROUGH WEDNESDAY NIGHT.
SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND EVENING.