HAZARDOUS WEATHER OUTLOOK
Issue Date: 441 PM CST WED DEC 23 2009
Expiration: 600 AM CST THU DEC 24 2009

Expires:200912241200;;
FLUS43 KDMX 232221 CCA
HWODMX
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
416 PM CST WED DEC 23 2009
IAZ062-074-075-084>086-095>097-241200-
POWESHIEK-MARION-MAHASKA-LUCAS-MONROE-WAPELLO-WAYNE-APPANOOSE-DAVIS-
416 PM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.
.DAY ONE...THIS AFTERNOON AND TONIGHT
A FEW THUNDERSTORMS ARE POSSIBLE SOUTH OF INTERSTATE 80 THROUGH THIS
EVENING. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A POTENT WINTER STORM IS EXPECTED TO CONTINUE TO AFFECT THE STATE
THURSDAY INTO SATURDAY. HOWEVER...WARMER AIR WILL PUSH INTO THE
AREA AHEAD OF THE SURFACE LOW PRESSURE FOR A LONG DURATION. THIS
IS EXPECTED TO CAUSE FOR RAIN ON THURSDAY BEFORE SWITCHING OVER
TO A WINTRY MIX THURSDAY EVENING AND THURSDAY NIGHT...THEN TO ALL
SNOW BY FRIDAY AND INTO THE WEEKEND. TOTAL RAINFALL AMOUNTS OF UP
TO 2 INCHES ARE POSSIBLE BY THURSDAY NIGHT. IN ADDITION...WITH THE
CURRENT SNOW PACK CONTAINING AROUND 1 TO 2 INCHES OF LIQUID
EQUIVALENT...AREAS OF FLOODING ARE POSSIBLE...ESPECIALLY AREAS
PRONE TO ICE JAMS AND RAPID RISES IN RIVER AND CREEK LEVELS. A
FLOOD WATCH IS IN EFFECT FOR THE AREA FROM THURSDAY MORNING
THROUGH THURSDAY NIGHT. PLEASE REFER TO THE NATIONAL
WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER
DETAILS.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE
ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED.
$$

FLOOD WATCH
Issue Date: 358 PM CST WED DEC 23 2009
Expiration: 600 AM CST FRI DEC 25 2009

...FLOODING RESULTING FROM SIGNIFICANT RAINFALL...ALONG WITH
SNOW MELT AND ICE JAMS...POSSIBLE THURSDAY INTO THURSDAY NIGHT...
.A STRONG STORM SYSTEM WILL BRING THE POSSIBILITY OF FLOODING.
PRECIPITATION TYPE WILL BE A MAJOR DRIVING FORCE IN THE FLOODING
THREAT. MODERATE TO HEAVY RAIN...ALONG WITH POSSIBLE
THUNDERSTORMS...ARE POSSIBLE. RAINFALL AMOUNTS OF A HALF INCH TO
TWO INCHES ARE EXPECTED THROUGH THURSDAY NIGHT.
IAZ039-049-050-060>062-073>075-083>086-094>097-240600-
/O.NEW.KDMX.FA.A.0002.091224T1200Z-091225T1200Z/
/00000.0.IC.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BLACK HAWK-MARSHALL-TAMA-POLK-JASPER-POWESHIEK-WARREN-MARION-
MAHASKA-CLARKE-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS-
INCLUDING THE CITIES OF...WATERLOO...MARSHALLTOWN...TOLEDO...
DES MOINES...NEWTON...GRINNELL...INDIANOLA...KNOXVILLE...
OSKALOOSA...OSCEOLA...CHARITON...ALBIA...OTTUMWA...LEON...
CORYDON...CENTERVILLE...BLOOMFIELD
358 PM CST WED DEC 23 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