MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE COUNTIES IN IA; MON JUL 11 2016

TODAY AND TONIGHT: SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING AS A COLD FRONT MOVES INTO THE AREA. LARGE HAIL…DAMAGING WINDS AND ISOLATED TORNADOES ARE ALL POSSIBLE.

THUNDERSTORMS ARE FORECAST TO DEVELOP IN NORTHEAST NEBRASKA BY MID AFTERNOON…THEN SPREAD SOUTH AND EAST ACROSS THE REST OF EASTERN NEBRASKA AND SOUTHWEST IOWA LATE THIS AFTERNOON AND EVENING. SUFFICIENT INSTABILITY AND SHEAR PARAMETERS WILL EXIST FOR SUPERCELL STORMS THAT WILL BE CAPABLE OF PRODUCING ALL MODES OF SEVERE WEATHER. THE STORMS ARE EXPECTED TO MERGE INTO CLUSTERS OR LINES BY LATE EVENING WHEN TRAINING OF STORMS COULD PRODUCE LOCALLY HEAVY RAINFALL OF GREATER THAN 2 INCHES…LIKELY OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

THE THREAT OF SEVERE WEATHER SHOULD BE ENDING BY MID EVENING IN
NORTHEAST NEBRASKA…BUT COULD PERSIST PAST MIDNIGHT IN EAST
CENTRAL AND SOUTHEAST NEBRASKA…AS WELL AS ALL OF SOUTHWEST IOWA. BEFORE THE THE RAIN ARRIVES…ANOTHER HOT AND HUMID DAY IS
EXPECTED WITH AFTERNOON HEAT INDEX VALUES INCREASING TO 100 TO 105 DEGREES ALONG AND SOUTH OF INTERSTATE 80.

TUESDAY/WEDNESDAY: THERE IS A CHANCE FOR SEVERE THUNDERSTORMS AGAIN ON TUESDAY AND WEDNESDAY…MAINLY SOUTH OF INTERSTATE 80. THE COLD FRONT MOVING THROUGH MONDAY NIGHT IS FORECAST TO STALL JUST SOUTH OF THE AREA EARLY TUESDAY…THEN SURGE BACK NORTH INTO OUR AREA TUESDAY AFTERNOON AND WEDNESDAY.  ADDITIONAL THUNDERSTORMS ARE POSSIBLE EACH DAY FRIDAY THROUGH
SUNDAY.

SPOTTER INFORMATION STATEMENT: SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.