Castle Creek above Deerfield, SD
River level and flood forecast · Pennington County
Normal2.8 ftas of Mon 1 PM
The river is 3.2 ft below flood stage (6 ft).
Flow: 8 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 5 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 7.5 ft |
| Moderate flood stage | 7 ft |
| Flood stage | 6 ft |
| Action stage | 4.5 ft |
| Record crest (March 15, 2019) | 6.54 ft |
What floods at each level
From the National Weather Service, highest first.
- 13 ftWater covers the floor of the gage house.
- 7.5 ftMajor flood stage. Extensive inundation of structures and roads is possible along Castle Creek.
- 7 ftModerate flood stage. Some inundation of structures and roads along Castle Creek are possible.
- 6 ftMinor flood stage. Minor flooding along Castle Creek.
- 4.5 ftAction stage. Low lying areas along Castle Creek begin to flood.
Highest crests on record
- 6.54 ft — March 15, 2019
- 6.48 ft — November 23, 1984
- 6.31 ft — July 16, 1984
- 5.91 ft — February 20, 2020
- 5.85 ft — February 9, 2012
Recent crests: 3.87 ft (February 18, 2024) · 3.11 ft (October 12, 2023) · 4.41 ft (June 29, 2023) · 5.76 ft (April 7, 2023) · 3.11 ft (May 13, 2022)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CTCS2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.