FLOOD WATCH
Warning Issue Date: 921 PM CST WED DEC 23 2009
...FLOOD WATCH REMAINS IN EFFECT FROM 6 AM CST THURSDAY THROUGH
LATE THURSDAY NIGHT...
THE FLOOD WATCH CONTINUES FOR
* PORTIONS OF CENTRAL IOWA...NORTHEAST IOWA...SOUTH CENTRAL IOWA
AND SOUTHEAST IOWA...INCLUDING THE FOLLOWING AREAS...IN
CENTRAL IOWA...JASPER...MARSHALL...POLK...POWESHIEK AND TAMA.
IN NORTHEAST IOWA...BLACK HAWK. IN SOUTH CENTRAL IOWA...
APPANOOSE...CLARKE...DECATUR...LUCAS...MAHASKA...MARION...
MONROE...WARREN AND WAYNE. IN SOUTHEAST IOWA...DAVIS AND
WAPELLO.
* FROM 6 AM CST THURSDAY THROUGH LATE THURSDAY NIGHT
* MODERATE TO HEAVY RAINFALL...AND SOME THUNDERSTORMS...ARE
EXPECTED. THIS RAINFALL...COMBINED WITH SNOW MELT...MAY LEAD
TO FLOODING ON AREA RIVERS. LOCALIZED FLOODING MAY ALSO OCCUR
IN OTHER AREAS...SUCH AS URBAN AREAS...WHERE THE DRAINAGE
SYSTEMS MAY BE IMPAIRED DUE TO SNOW AND ICE CLOGGED INTAKES.
* ANOTHER CONCERN IS BREAK UP ICE JAMS ON AREA RIVERS. THE
RUNOFF WILL LIKELY BE ENOUGH TO BREAK UP THE ICE ESPECIALLY AS
ONE MOVES SOUTHWARD. SINCE THE RIVER ICE IS RELATIVELY THIN...
THOUGH...ONLY MINOR...LOCALIZED PROBLEMS DUE TO ICE JAMS ARE
EXPECTED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
$$
COGIL
WINTER STORM WATCH
Warning Issue Date: 123 AM CST THU DEC 24 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST EARLY
THIS MORNING...
...WINTER STORM WATCH REMAINS IN EFFECT FROM NOON CST TODAY
THROUGH FRIDAY EVENING...
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...PERIODS OF FREEZING DRIZZLE TO LIGHT RAIN
WILL PERSIST THROUGH THE OVERNIGHT. TEMPERATURES ARE BEGINNING
TO RISE ABOVE FREEZING OVER MUCH OF THE AREA WHICH WILL MINIMIZE
ADDITIONAL ICE ACCUMULATIONS. HOWEVER...TRAVEL WILL REMAIN
HAZARDOUS... ESPECIALLY ON LESS TRAVELED ROADS.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION IS EXPECTED TO TRANSITION
BACK TO A WINTRY MIX MID TO LATE MORNING TODAY AND EVENTUALLY
ALL SNOW LATE. ONCE IT DOES THE SNOW MAY BE HEAVY AND WIND
BLOWN...ESPECIALLY INTO FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...SIX TO TWELVE INCHES OF SNOW IS
EXPECTED BY SATURDAY WITH THE HIGHEST AMOUNTS OF THAT RANGE
FROM NEAR BOONE TO IOWA FALLS.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON TODAY
INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME NORTHWEST AT 25
TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...VISIBILITIES LESS THAN A QUARTER MILE DURING THE
HEAVIEST SNOWS CAN BE EXPECTED. INCREASING WINDS AND SNOW
COINCIDENT BY FRIDAY WILL REDUCE VISIBILITIES TO NEAR BLIZZARD
CONDITIONS ESPECIALLY WEST OF INTERSTATE 35.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WATCH AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND
DRIFTING SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE
DRIVING.
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$
WINTER WEATHER ADVISORY
Warning Issue Date: 123 AM CST THU DEC 24 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST EARLY
THIS MORNING...
...WINTER STORM WATCH REMAINS IN EFFECT FROM NOON CST TODAY
THROUGH FRIDAY EVENING...
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...PERIODS OF FREEZING DRIZZLE TO LIGHT RAIN
WILL PERSIST THROUGH THE OVERNIGHT. TEMPERATURES ARE BEGINNING
TO RISE ABOVE FREEZING OVER MUCH OF THE AREA WHICH WILL MINIMIZE
ADDITIONAL ICE ACCUMULATIONS. HOWEVER...TRAVEL WILL REMAIN
HAZARDOUS... ESPECIALLY ON LESS TRAVELED ROADS.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION IS EXPECTED TO TRANSITION
BACK TO A WINTRY MIX MID TO LATE MORNING TODAY AND EVENTUALLY
ALL SNOW LATE. ONCE IT DOES THE SNOW MAY BE HEAVY AND WIND
BLOWN...ESPECIALLY INTO FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...SIX TO TWELVE INCHES OF SNOW IS
EXPECTED BY SATURDAY WITH THE HIGHEST AMOUNTS OF THAT RANGE
FROM NEAR BOONE TO IOWA FALLS.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON TODAY
INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME NORTHWEST AT 25
TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...VISIBILITIES LESS THAN A QUARTER MILE DURING THE
HEAVIEST SNOWS CAN BE EXPECTED. INCREASING WINDS AND SNOW
COINCIDENT BY FRIDAY WILL REDUCE VISIBILITIES TO NEAR BLIZZARD
CONDITIONS ESPECIALLY WEST OF INTERSTATE 35.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WATCH AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND
DRIFTING SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITY...AND USE CAUTION WHILE
DRIVING.
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$
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