HYDROLOGIC OUTLOOK
Warning Issue Date: 318 PM CST FRI DEC 25 2009
RAINFALL AND MELTING SNOW MAY CAUSE PONDING IN LOW LYING AND
URBAN AREAS TONIGHT AS WELL AS RISES ALONG AREA CREEKS AND
RIVERS...
A SIGNIFICANT WINTER STORM HAS BROUGHT WARMER AIR...ALONG WITH
RAIN TO PARTS OF NORTHEAST IOWA...SOUTHWEST WISCONSIN AND SOUTHEAST
MINNESOTA ON THURSDAY. AS THE MAIN PART OF THE STORM SYSTEM MOVES
NORTHWARD TOWARDS THE UPPER MISSISSIPPI RIVER VALLEY REGION
TONIGHT...WARM AIR WILL CONTINUE TO PUSH INTO THE AREA LEADING TO
VERY MINIMAL TEMPERATURE FALLS. THUS...TEMPERATURES WILL STAY AT
OR ABOVE THE FREEZING MARK OVERNIGHT...ALLOWING FURTHER MELTING OF
THE SNOW PACK.
IN ADDITION...PRECIPITATION WILL FALL THROUGH MUCH OF THE NIGHT...MAINLY
IN THE FORM OF RAIN. AMOUNTS BETWEEN ONE HALF TO ONE INCH ARE EXPECTED
THROUGH FRIDAY MORNING.
THE COMBINATION OF THE RAINFALL ALONG WITH MELTING OF THE WIDESPREAD
SNOW PACK WILL INCREASE RUNOFF AMOUNTS...WHICH MAY 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 AMOUNTS OF WATER ENTERING THE RIVER
SYSTEMS THERE REMAINS POTENTIAL 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.
$$
BROOKS
WINTER STORM WARNING
Warning Issue Date: 551 PM CST FRI DEC 25 2009
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM CST FRIDAY...
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM CST FRIDAY.
* RAIN WILL CONTINUE OVER THE AREA THROUGH THE EARLY EVENING
HOURS...WITH SOME FREEZING RAIN LIKELY ON THE RIDGE TOPS AND
HIGHER TERRAIN AREAS. BY LATE EVENING A MIX OF RAIN...FREEZING
RAIN AND SLEET ARE LIKELY. AS THE PRECIPITATION BECOMES HEAVIER
OVERNIGHT...THE MIXED PRECIPITATION WILL LIKELY CHANGE TO SNOW. THE
PRECIPITATION WILL LAST THROUGH CHRISTMAS DAY.
* ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES ARE EXPECTED
BEFORE THE STORM ENDS. ADDITIONAL ICE ACCUMULATIONS UP TO A
QUARTER OF AN INCH ARE EXPECTED THROUGH FRIDAY.
* HAZARDOUS TRAVEL CONDITIONS ARE EXPECTED THROUGH CHRISTMAS DAY
DUE TO SNOW AND ICE ACCUMULATIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...SLEET...
AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO
POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.
$$
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