HYDROLOGIC OUTLOOK
Warning Issue Date: 422 AM CST FRI DEC 25 2009
RAINFALL AND MELTING SNOW MAY CAUSE PONDING IN LOW LYING AND
URBAN AREAS TODAY AS WELL AS RISES ALONG AREA CREEKS AND
RIVERS...
A SIGNIFICANT WINTER STORM HAS BROUGHT WARMER AIR...ALONG WITH
RAIN ACROSS PARTS OF NORTHEAST IOWA...SOUTHWEST WISCONSIN AND
SOUTHEAST MINNESOTA. AS THE STORM SYSTEM MOVES NORTHWARD TOWARD THE
UPPER MISSISSIPPI RIVER VALLEY REGION TODAY...RAIN WILL CONTINUE
ACROSS THE AREA THROUGH THIS MORNING...EVENTUALLY TRANSITIONING TO
SNOW THIS AFTERNOON. RAINFALL THROUGH THIS MORNING WILL BE IN THE
QUARTER TO HALF INCH RANGE. THIS RAINFALL COMBINED WITH WHAT FELL
FROM THURSDAY THROUGH THURSDAY NIGHT WILL CONTINUE TO PRODUCE SNOW
MELT AND SOME RUNOFF.
THE COMBINATION OF THE RAINFALL ALONG WITH MELTING OF THE WIDESPREAD
SNOW PACK IS EXPECTED TO INCREASE RUNOFF AMOUNTS...WHICH WILL LIKELY
LEAD TO PONDING IN LOW LYING AND URBAN AREAS AS WELL AS WITHIN BANK
RISES ALONG AREA CREEKS AND RIVERS...WITH THE POSSIBILITY FOR SOME
LOCALIZED FLOODING. ALSO...WITH THE AMOUNT OF WATER ENTERING THE
RIVER SYSTEMS...THE POTENTIAL REMAINS FOR ICE JAMS...WHICH COULD
LEAD TO SOME LOCALIZED FLOODING.
THOSE WITH RIVER INTERESTS OR WHO LIVE IN LOW LYING AREAS SHOULD
REMAIN ALERT FOR POSSIBLE WATER ISSUES OVER THE NEXT SEVERAL DAYS.
$$
DAS
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