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051 

RWUS32 KDSM 110909

FFSDSM

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-

092>097-111600-



FLOOD STATEMENT

NATIONAL WEATHER SERVICE DES MOINES IA

410 AM CDT WED APR 11 2001



WATCH INFORMATION-- A FLOOD WATCH REMAINS IN EFFECT UNTIL 400 PM CDT 

TODAY FOR THE ENTIRE DES MOINES NATIONAL WEATHER SERVICE FORECAST 

AREA. 



SOME CITIES IN THE WATCH INCLUDE

ALGONA...AMES...ATLANTIC...CARROLL...CENTERVILLE...CHARITON...

CRESTON...DENISON...DES MOINES...ESTHERVILLE...FORT DODGE... 

GRINNELL...INDIANOLA...IOWA FALLS...KNOXVILLE...LAMONI... 

MARSHALLTOWN...MASON CITY...NEWTON...OSKALOOSA...OTTUMWA... 

PELLA...PERRY...WATERLOO...AND WEBSTER CITY.



RECENT REPORTS-- SPOTTERS AND MEDIA AS WELL AS NATIONAL WEATHER 

SERVICE DOPPLER RADAR RAINFALL ESTIMATES INDICATE THAT A NARROW 

SWATH OF 1 TO 2 INCHES OF RAIN FELL FROM JUST SOUTHWEST OF 

ATLANTIC...EAST TO INDIANOLA TUESDAY EVENING. RADAR RAINFALL 

ESTIMATES FROM THIS MORNING INDICATE THAT WIDESPREAD QUARTER TO A 

HALF INCH OF RAIN HAS FALLEN OVER THE NORTHERN HALF OF THE STATE 

WITH PLACES RECEIVING AS MUCH AS AN INCH. 



FORECAST RAINFALL-- SHOWERS AND THUNDERSTORMS ARE FORECAST TO 

PRODUCE 1 TO 2 INCHES OF RAINFALL ACROSS PORTIONS OF THE FORECAST 

AREA TODAY WITH THE GREATEST POTENTIAL ACROSS THE SOUTHERN TWO 

THIRDS OF THE DES MOINES NATIONAL WEATHER SERVICE FORECAST AREA. 

LOCALLY HIGHER AMOUNTS ARE POSSIBLE WITH THE HEAVIEST CONVECTION.



METEOROLOGICAL COMMENTS-- A WARM FRONT EXTENDS ACROSS CENTRAL IOWA 

JUST SOUTH OF INTERSTATE 80. AREAS OF SHOWERS AND THUNDERSTORMS 

EXTEND ACROSS NORTHERN IOWA WITH A LARGE AREA OF THUNDERSTORMS 

MOVING FROM EASTERN NEBRASKA INTO WESTERN IOWA. MODERATE TO HIGH 

AMOUNTS OF MOISTURE WILL LIFT OVER THE WARM FRONT AND SUSTAIN THE ON 

GOING AREAS OF THUNDERSTORMS THIS MORNING. THE AREA OF THUNDERSTORMS 

OVER WESTERN IOWA WILL PUSH INTO EASTERN IOWA LATER THIS MORNING. 

THE AREA OF THUNDERSTORMS ACROSS NORTHERN IOWA WILL LIFT NORTH INTO 

SOUTHERN MINNESOTA BY MIDDAY. ANOTHER ROUND OF THUNDERSTORMS 

CAN BE EXPECTED BY THIS AFTERNOON AS THE UPPER LEVEL STORM SYSTEM 

OVER WEST TEXAS AND WESTERN KANSAS LIFTS NORTHEAST INTO IOWA. 



PRECAUTIONS-- A FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR 

HEAVY RAIN ACROSS THE WATCH AREA...WHICH MAY LEAD TO FLOODING ALONG 

AREA RIVERS. IF YOU ARE IN THE WATCH AREA...CHECK YOUR PREPAREDNESS 

REQUIREMENTS...ESPECIALLY IF YOU HAVE INTERESTS ALONG AREA RIVERS. 

KEEP INFORMED...AND BE READY FOR ACTION IF FLOODING IS OBSERVED OR IF

A FLOOD WARNING IS ISSUED.



TC

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