FLOOD WATCH
Warning Issue Date: 358 PM CST THU DEC 24 2009
...FLOOD WATCH IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLOOD WATCH 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 THURSDAY MORNING 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.
* RIVERS MOST LIKELY TO BE AFFECTED INCLUDE THE CHARITON...DES
MOINES RIVER FROM DES MOINES DOWNSTREAM...AS WELL AS THE SOUTH
SKUNK...CEDAR CREEK...AND THE THOMPSON RIVERS. OTHER SMALLER
STREAMS AND CREEKS MAY ALSO BE AFFECTED.
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.
$$
ZOGG
WINTER STORM WATCH
Warning Issue Date: 343 PM CST THU DEC 24 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...
A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT. A WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY
AFTERNOON THROUGH FRIDAY EVENING.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...AN AREA OF LIGHT TO MODERATE FREEZING RAIN
CONTINUES TO MOVE NORTH ACROSS WESTERN SECTIONS OF IOWA THIS
AFTERNOON...THE PRECIPITATION MAY MIX WITH SNOW TOWARD
EVENING. UP TO TWO TENTHS OF ICE WILL ACCUMULATE THIS
AFTERNOON. AN INCH OR TWO OF SNOW IS ALSO EXPECTED THROUGH
THAT TIME WITH THE HIGHEST AMOUNTS IN THAT RANGE TOWARD
HIGHWAY 20.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT AND EARLY THURSDAY BEFORE TRANSITIONING BACK
TO A WINTRY MIX AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT
DOES THE SNOW MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO
FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...SIX TO TWELVE INCHES OF SNOW IS EXPECTED
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...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY
AND FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE
AND EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS.
WITH INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING
SNOW AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS
ARE EXPECTED BY THAT TIME 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: 343 PM CST THU DEC 24 2009
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...
A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT. A WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY
AFTERNOON THROUGH FRIDAY EVENING.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...AN AREA OF LIGHT TO MODERATE FREEZING RAIN
CONTINUES TO MOVE NORTH ACROSS WESTERN SECTIONS OF IOWA THIS
AFTERNOON...THE PRECIPITATION MAY MIX WITH SNOW TOWARD
EVENING. UP TO TWO TENTHS OF ICE WILL ACCUMULATE THIS
AFTERNOON. AN INCH OR TWO OF SNOW IS ALSO EXPECTED THROUGH
THAT TIME WITH THE HIGHEST AMOUNTS IN THAT RANGE TOWARD
HIGHWAY 20.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT AND EARLY THURSDAY BEFORE TRANSITIONING BACK
TO A WINTRY MIX AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT
DOES THE SNOW MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO
FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...SIX TO TWELVE INCHES OF SNOW IS EXPECTED
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...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY
AND FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE
AND EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS.
WITH INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING
SNOW AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS
ARE EXPECTED BY THAT TIME 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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