Boulder River at Big Timber, MT
River level and flood forecast · Sweet Grass County
Normal1.2 ftas of Mon 12 PM
The river is 6.8 ft below flood stage (8 ft).
Flow: 125 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
| Flood stage | 8 ft |
| Record crest (June 5, 1997) | 9 ft |
What floods at each level
From the National Weather Service, highest first.
- 7.5 ftMinor flooding along the south bank.
Highest crests on record
- 9 ft — June 5, 1997
- 8.56 ft — June 13, 2022
- 8.33 ft — June 1, 2020
- 8.25 ft — July 8, 1975
- 8.04 ft — June 30, 2011
Recent crests: 6.74 ft (June 11, 2024) · 5.97 ft (June 3, 2023) · 8.56 ft (June 13, 2022) · 7.44 ft (June 6, 2021) · 8.33 ft (June 1, 2020)
Up and down the river, and nearby
- East Boulder River near Mcleod, MT
- Shields River near Livingston, MT
- Stillwater River (South Central MT) near Absarokee, MT
- Yellowstone River near Livingston, MT
- Shields River above Wilsall, MT
- Musselshell River near Shawmut, MT
- Musselshell River near Harlowton, MT
- West Rosebud Creek near Emerald Lake Campground, MT
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BTMM8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.