A STRONG UPPER AIR DISTURBANCE WILL MOVE NORTHEASTWARD THIS
EVENING AHEAD OF A COLD FRONT. AS WHAT HAS BEEN A TREND RECENTLY…
THIS STORM SYSTEM WILL LIKELY CAUSE AREAS OF HEAVY RAIN TO OCCUR
ALONG AND EAST OF A YANKTON…TO SIOUX FALLS…TO NEAR MARSHALL
MINNESOTA LINE…ESPECIALLY DURING THE EVENING HOURS. AREAS OF 2
TO 3 INCHES OF RAIN WILL LIKELY OCCUR IN THESE AREAS…WITH
LOCALLY HEAVIER AMOUNTS QUITE POSSIBLE DUE TO A VERY HUMID
ATMOSPHERE. IN ADDITION…WIDESPREAD RAINFALL OF 2 TO 3 INCHES
AND MORE HAS OCCURRED THROUGHOUT THIS AREA…CREATING SATURATED
GROUND. THE RAINFALL WILL TAPER OFF AFTER MIDNIGHT TONIGHT…WITH
LARGE RAINFALL AMOUNTS NOT EXPECTED FOR THE UPCOMING WEEK.

…FLASH FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY
MORNING…

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WATCH FOR PORTIONS OF NORTHWEST IOWA…SOUTHWEST
MINNESOTA…NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA…
INCLUDING THE FOLLOWING AREAS…IN NORTHWEST IOWA…BUENA
VISTA…CHEROKEE…CLAY…DICKINSON…IDA…LYON…OBRIEN…
OSCEOLA…PLYMOUTH…SIOUX AND WOODBURY. IN SOUTHWEST
MINNESOTA…COTTONWOOD…JACKSON…LYON…MURRAY…NOBLES…
PIPESTONE AND ROCK. IN NORTHEAST NEBRASKA…DAKOTA. IN
SOUTHEAST SOUTH DAKOTA…UNION.

* FROM THIS AFTERNOON THROUGH MONDAY MORNING

* RAINFALL TOTALS COULD AVERAGE A WIDESPREAD 1 TO 3 INCHES
TONIGHT…WITH LOCALLY HEAVIER AMOUNTS. IN ADDITION…THE WATCH
AREA HAS RECEIVED A WIDESPREAD 2 TO 4 INCHES OF RAIN THE PAST
SEVERAL DAYS WITH LOCAL AMOUNTS EXCEEDING 5 INCHES. THEREFORE
THE GROUND IS SATURATED.

* FLOODING IS POSSIBLE IN LOW LYING AND POOR DRAINAGE AREAS. IN
ADDITION…HEAVY RAINFALL IN SHORT PERIODS OF TIME FREQUENTLY
CAUSE URBAN FLOODING AND CAN WASH OUT UNPAVED RURAL ROADS.
SATURATED GROUND WILL ADD TO FLOODING POTENTIAL. IN ADDITION TO
THE THREAT OF FLASH FLOODING…THE HEAVY RAINS COULD ALSO RESULT
IN FLOODING ALONG AREA CREEKS AND RIVERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.