HYDROLOGIC OUTLOOK
Issue Date: 339 PM CST TUE DEC 22 2009
Expiration: 345 AM CST WED DEC 23 2009

...FLOODING RESULTING FROM SIGNIFICANT RAINFALL...ALONG WITH
SNOW MELT AND ICE JAMS...POSSIBLE WEDNESDAY AND THURSDAY...
A STRONG WEATHER SYSTEM WILL BRING THE POSSIBILITY OF FLOODING TO
CENTRAL AND SOUTHERN IOWA THROUGH THURSDAY. THE TYPE OF
PRECIPITATION WILL BE A MAJOR DRIVING FORCE IN THE FLOODING THREAT.
THE COMBINATION OF ABOVE FREEZING TEMPERATURES...ALONG WITH
SEASONALLY MODERATE TO HEAVY RAINFALL...WILL LEAD TO A POTENTIALLY
SIGNIFICANT AMOUNT OF SNOW MELT AND RUNOFF INTO AREA STREAMS.
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. ESTIMATED RIVER
ICE DEPTHS RANGE FROM 2 INCHES IN SOUTHEAST IOWA...TO 6 INCHES IN
CENTRAL IOWA. 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.
KEEP CURRENT ON THE LATEST FORECASTS...INCLUDING POSSIBLE WATCHES
AND WARNINGS.
$$
ZOGG

HAZARDOUS WEATHER OUTLOOK
Issue Date: 438 PM CST TUE DEC 22 2009
Expiration: 430 PM CST WED DEC 23 2009

Expires:200912232230;;
FLUS43 KDMX 222223
HWODMX
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
423 PM CST TUE DEC 22 2009
IAZ085-086-092>097-232230-
MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
423 PM CST TUE DEC 22 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.
.DAY ONE...TONIGHT
PATCHY LIGHT FREEZING DRIZZLE WILL AFFECT THE AREA THROUGH THIS
EVENING LEADING TO A LIGHT GLAZE OF ICE ACCRUAL ON EXPOSED AND
UNTREATED SURFACES.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A MAJOR WINTER STORM WILL AFFECT THE STATE WEDNESDAY THROUGH
FRIDAY. WARMER AIR IS EXPECTED TO PUSH INTO THE SOUTHERN PORTION OF
THE STATE WHICH WILL LEAD TO PRECIPITATION IN THE FORM OF RAIN
GENERALLY ALONG AND SOUTH HIGHWAY 34 FROM LATE WEDNESDAY MORNING
INTO THURSDAY. EXPECT A MIX OF SNOW...SLEET AND RAIN THURSDAY
NIGHT BEFORE SWITCHING TO ALL SNOW DURING THE OVERNIGHT HOURS
THURSDAY INTO FRIDAY. RAINFALL AMOUNTS OF 1 TO NEARLY 2 INCHES ARE
POSSIBLE WEDNESDAY INTO THURSDAY AND TEMPERATURES REMAINING IN THE
UPPER 30S TO AROUND 40. WITH THE RAINFALL AMOUNTS ON TOP OF THE
SNOW MELT...AREAS OF FLOODING ARE POSSIBLE...ESPECIALLY WITH RAPID
RISES DUE TO ICE JAMS ALONG RIVERS AND CREEKS.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT SNOWFALL AMOUNTS AND
ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED.
$$