Fourmile Creek near Ankeny NE 86th Ave, IA

River level and flood forecast · Polk County

Normal2.8 ftas of Mon 2:47 PM

The river is 8.2 ft below flood stage (11 ft).

Flow: 117 cubic feet per second (USGS).

The last 7 days and the forecast

02.557.51012.5TueWedThuFriSatSunMonAction 8 ftFlood 11 ftNowObserved (ft)NWS forecast

NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

Flood stage11 ft
Action stage8 ft
Record crest (July 1, 2018)16.17 ft

What floods at each level

From the National Weather Service, highest first.

  • 11.2 ftWater affects back yards along NE Hillcrest Ct and possibly affects I-35 near MM 94.
  • 10 ftWater affects a few houses west of NE Delaware Ave.
  • 7.6 ftThe creek is near bankfull.

Highest crests on record

  1. 16.17 ft — July 1, 2018
  2. 13.69 ft — August 11, 2010
  3. 12.19 ft — July 28, 2008
  4. 10.68 ft — March 13, 2019
  5. 10.6 ft — May 23, 2004

Recent crests: 8.36 ft (May 20, 2025) · 9.91 ft (May 21, 2024) · 6.01 ft (May 5, 2023) · 9.33 ft (April 22, 2022) · 5.78 ft (June 25, 2021)

Up and down the river, and nearby

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (ANKI4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.