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354 

RWUS32 KDSM 241835

FFSDSM

IAZ027-028-037>039-047>050-058>062-070>075-081>086-092>097-250000-



URBAN AND SMALL STREAM FLOOD ADVISORY

NATIONAL WEATHER SERVICE DES MOINES IA

1234 PM CST SAT FEB 24 2001



ADVISORY INFORMATION--AN URBAN AND SMALL STREAM FLOOD ADVISORY HAS

BEEN ISSUED FOR PORTIONS OF SOUTHERN...CENTRAL...AND EASTERN IOWA

UNTIL 600 PM.  THE ADVISORY IS ALONG AND SOUTHEAST OF AN ATLANTIC...

TO BOONE...TO ALLISON LINE AND INCLUDES THE BIGGER CITIES OF DES

MOINES...AMES...WATERLOO...CRESTON...GRINNELL AND OTTUMWA.



RECENT REPORTS--OBSERVED RAINFALL AND NATIONAL WEATHER SERVICE

DOPPLER RADAR ESTIMATES INDICATE THAT ANYWHERE FROM A QUARTER INCH

TO OVER AN INCH OF RAIN HAS FALLEN ACROSS CENTRAL AND SOUTHERN

IOWA SINCE 600 AM...WITH HIGHEST AMOUNTS FROM ATLANTIC TO LAMONI AND

POINTS SOUTHWEST.



FORECAST RAINFALL--NATIONAL WEATHER SERVICE DOPPLER RADARS INDICATE

MORE RAIN HEADING TOWARD THE ADVISORY AREA FROM EASTERN KANSAS AND

MISSOURI.  RAINFALL RATES OVER CENTRAL AND SOUTHERN IOWA MAY CONTINUE

TO EXCEED A QUARTER INCH PER HOUR THIS AFTERNOON WITH WIDESPREAD

RAINFALL AMOUNTS OF 1 TO 2 INCHES BY EARLY EVENING.



METEOROLOGICAL COMMENTS--RECENT RAINS FROM LAST NIGHT AND THIS

MORNING IN COMBINATION WITH MELTING SNOW AND ADDITIONAL RAINS THIS

AFTERNOON WILL CONTINUE TO CAUSE PONDING OF WATER ON ROADS AND

RISES IN SMALL STREAMS AND CREEKS.  MODERATE RAINFALL RATES AND

SNOW CLOGGED DRAINS WILL MAKE IT DIFFICULT FOR WATER TO DRAIN

FROM ROADS...ESPECIALLY IN URBAN AREAS.



THE RAINS WILL RUNOFF INTO SMALL STEAMS AND CREEKS AS WELL WHICH MAY

REACH BANKFULL WITH ICE PROHIBITING NORMAL DRAINAGE AND STREAMFLOW.



PRECAUTIONS--BE PREPARED FOR STANDING WATER ON ROADS AND HIGHWAYS.

STAY AWAY FROM SMALL STREAMS AND CREEKS WHICH MAY FILL WITH WATER

QUICKLY.

$$



SMALL

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