The first significant rainfall of the month affected much of the Des Moines Hydrologic Service Area (HSA) on the  5th as scattered showers and the seasons's first thunderstorms moved across the area. The 24-hour isohyetal map showed a chaotic pattern as 0.50 to 0.75 inches fell across west central Iowa, mainly in the North Raccoon River basin. Rains in excess of a half-inch fell along the southern border of Iowa. Less than 0.10 of an inch fell over northwest and south central parts of the HSA, while a broad area of around 0.25 inches fell from just north of Des Moines northeast into the Cedar basin. Early on the 6th a few severe storms developed over west central Iowa and moved just north of Des Moines. Hail and brief heavy rain (0.68") accompanied the storms as they passed over the Des Moines WFO in Johnston.  Numerous Flood Statements and several Flood Warnings were issued on the 7th in response to pervious rains and the forecast rainfall for the next 24 hours. Heavy rains did develop across much of Iowa on the 8th, with the highest amounts over the southwest and central portions of the HSA: The cooperative observer at Blockton picked up 2.45", Beaconsfield 2.07", and the Des Moines Airport ASOS 1.59". Widespread severe weather also occurred on the 8th into the early morning hours of the 9th and this was combined with heavy rainfall. Flash Flood Warnings were issued for eight counties, including Ringgold, Decatur, Taylor, Wayne, Dallas, Polk, Marshall and Story counties as radar and satellite estimated rain of up to 4 inches fell in parts of the affected counties. Renewed rains developed on the 10th and began an extraordinarily wet period, especially for northwestern parts of the HSA. At Estherville, in the upper Des Moines River basin, a 2-day total of 2.79" fell on the 10th and 11th.  These rains drove the West Fork Des Moines River well above Flood Stage from the Minnesota River downstream to its confluence with the mainstem Des Moines River at Humboldt. Estherville (ESVI4) crested at 13.38 feet on the 12th, which was the highest level since 1993 (15.38 ft.) and the 8th highest on record. At Emmetsburg, the river crested on the 14th  at 12.31 feet, also its highest level since 1993 and 10th highest on record.  Snowmelt flooding in the Cedar and Iowa basins peaked about mid-month, with the Cedar at Waterloo  (FS = 12) reaching 16.59 feet on the 15th and Iowa at Marshalltown (FS = 15) 15.86 feet on the 17th. None of the flooding was particularly serious. The second half of April saw a much drier weather pattern over much of central Iowa, although moderate to heavy rains fell across much of the region from April 21-22. The heaviest rains were again over the northwest sections of the HSA, which maintained  high river levels, but not reaching the levels seen a week earlier.  River levels fell through the rest of the month.

Flood in BLACK HAWK, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in BREMER, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in BUTLER, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in CALHOUN, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in CARROLL, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in CERRO GORDO, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in CLARKE, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in DECATUR, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in EMMET, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in FRANKLIN, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in GREENE, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in HAMILTON, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in HANCOCK, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in PALO ALTO, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in POCAHONTAS, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in SAC, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in STORY, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WAPELLO, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WAYNE, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WEBSTER, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WINNEBAGO, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WORTH, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in WRIGHT, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in HARDIN, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in HUMBOLDT, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in KOSSUTH, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in LUCAS, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in MAHASKA, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in MARION, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in MARSHALL, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.

Flood in MONROE, IOWA
From 07-APR-01 21:00:00 to 17-APR-01 03:00:00 (CST)
Property damage: .15M
Reported by: OFFICIAL NWS OBS.