Reno Gulch near Hill City, SD
River level and flood forecast · Pennington County
Normal3.7 ftas of Mon 2:20 PM
The river is 2.3 ft below flood stage (6 ft).
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 | 8 ft |
| Moderate flood stage | 7 ft |
| Flood stage | 6 ft |
| Action stage | 4.75 ft |
| Record crest (May 26, 2015) | 6.32 ft |
What floods at each level
From the National Weather Service, highest first.
- 8 ftMajor Flood Stage. Residences close to the river may flood.
- 7 ftModerate Flood Stage. Water begins to approach Pennington County Road T317.
- 6 ftMinor Flood Stage. Minor flooding of driveways which cross the river.
- 5 ftBankfull Stage. Overflows banks.
- 4.75 ftAction Stage.
Highest crests on record
- 6.32 ft — May 26, 2015
- 5.84 ft — June 18, 1998
- 5.34 ft — May 28, 2019
- 4.72 ft — July 6, 2011
- 4.54 ft — July 13, 1999
Recent crests: 3.85 ft (April 6, 2024) · 4.02 ft (June 29, 2023) · 4.39 ft (June 4, 2022) · 3.88 ft (May 23, 2021) · 4.09 ft (May 2, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (RGUS2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.