A significant flash flood event developed later on the 12th as heavy rains and severe storms developed along a stationary boundary located over central Iowa in the mid-morning hours. Storms continually redeveloped in a narrow band along the front throughout the day, before finally lifting north to produce more heavy rains over the upper Des Moines River basin. WSR-88D radar precipitation estimates were biased upward by the copious hail production in these storms. Radar estimates of 6 to 8 inches in a band across the southern portions of Greene, Boone and Story counties and much of Jasper and Polk, were difficult to verify with rain gage reports. However, unofficial reports indicated that 4 to 5 inches fell in the heaviest rain. Official reports included 2.66" at Ames 5SE (AESI4), 2.53" at Rhodes (RHDI4), 2.05" at Newton, 1.69" at Jefferson (JFFI4), 1.49 at Drake University (DDVI4) and 1.27" at Marshalltown (MSHI4).  Urban Small Stream Advisories for these counties were upgraded to Flash Flood Warnings by mid-afternoon as the storms continued to train across the same areas. Reports of road closures and damage in Story and Greens counties due to high water were received by the NWS. Minor river flooding also resulted along the North Raccoon River at Perry (PROI4) and on the South Skunk River at Oskaloosa (OOAI4).  The secondary band that developed over the far northwest counties in the DMX HSA produced 3.12" at the Estherville ASOS and caused the West Fork Des Moines river to quickly rise to flood stage and a River Flood Warning was issued later in the morning for Estherville (ESVI4). Flood Statements were also issued for minor flooding downstream on the West Fork Des Moines at Emmetsburg (EMTI4) and Humboldt (HBTI4) and on the East Fork Des Moines at Algona (AGNI4) and North Raccoon River at Jefferson (EFWI4). Basin-wide rainfall forecasts (QPF) of 1 to 1.5 inches over the upper Des Moines and Raccoon rivers were input into river forecasts for the 24-hours ending at 12Z on the 14th of June, helping to raise crest forecasts.Strong storms formed over the northwest half of the DMX HSA in the early morning hours of the 14th, with more moderate to heavy rain falling in parts of the North Raccoon and upper Des Moines River basins. WSR-88D radar rainfall estimates were 3 to 4 inches over Calhoun county in the North Raccoon basin and the cooperative observer at Rockwell City (RKWI4) measured 2.50". Also hit hard by heavy rains and flooding were Kossuth and Crawford counties, with radar estimates of 2 to 4 inches. Cooperative observers at Swea City (SWEI4) and Denison (DNSI4)  picked up 1.90" and 2.30", respectively. Urban/Small Stream Flood Advisories were issued for each of these counties during the early morning hours. Street flooding was reported in Manson and Rockwell City (Calhoun county) and in Denison (Crawford), with water over the road on Highway 169 (Kossuth).A short respite from the storms during the late morning of the 14th was followed by another line of storms moving into Iowa from the southwest during the early afternoon. The areal coverage from these storms was essentially the southeast one-half of the DMX HSA, almost completely missing the portion of the HSA that received heavy rains in the previous 24 hours. The storms were fast-moving enough to minimize rainfall accumulations, but parts of south central Iowa picked up 2 to 3 inches of rain, including Blockton (BLKI4), 3.15"; Centerville (CNTI4),  2.39"; Beaconsfield (BCNI4), 2.10" and Ottumwa ASOS (OTM), 2.02". As the storms moved north, Urban and Small Stream Flood Advisories were issued for Polk, northern Warren, southern Story and Jasper counties as the storms moved through around rush hour. The 0.75" to 1.25" inches of rain in less than an hour in Des Moines caused typical urban flooding, with many intersections and underpasses flooded and traffic tie-ups as a result. The Des Moines Airport ASOS (DSM) measured 0.48" in 15 minutes and the USGS DCP at SE 6th (DESI4) 0.75" in 30 minutes as the storms moved through. The storms continued moving rapidly northeast though Iowa producing scattered heavy rains mainly along and east of Interstate 35; cooperative reports included Mason City (MSCI4) 1.54" and Waterloo 1.18".  Numerous river flood forecasts were issued as a result of the rains, with eight forecast points in flood by the morning of the 15th and several other locations forecast to go into flood in coming days. By the 23rd, the last forecast point in the DMX HSA fell below flood stage, with the West Fork Des Moines River at Humboldt dropping below flood stage. None of the flooding across the HSA during June even reached the moderate category, with the exception of Estherville which briefly reached that category on the 13th.

Flood in WORTH, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WRIGHT, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in POCAHONTAS, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in POLK, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in SAC, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in STORY, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WAPELLO, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WARREN, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WAYNE, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WEBSTER, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in WINNEBAGO, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in MARION, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in MARSHALL, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in MONROE, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in PALO ALTO, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in LUCAS, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in MAHASKA, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in CALHOUN, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in CARROLL, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in CERRO GORDO, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in CLARKE, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in DALLAS, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in DECATUR, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in EMMET, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in FRANKLIN, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in GREENE, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in GRUNDY, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in HAMILTON, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in HANCOCK, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in HARDIN, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in HUMBOLDT, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in JASPER, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.

Flood in KOSSUTH, IOWA
From 12-JUN-01 15:00:00 to 23-JUN-01 18:00:00 (CST)
Property damage: 25K
Crop damage: 50K
Reported by: OFFICIAL NWS OBS.