Boulder River (Central MT) near Boulder, MT
River level and flood forecast · Jefferson County
Normal5.1 ftas of Mon 2:15 PM
Flow: 27 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.
What floods at each level
From the National Weather Service, highest first.
- 10 ftWater starting to impact rural roads south of Boulder
- 9 ftWater into fields and pastures.
- 8 ftAt 8.0 Feet...runoff from the Boulder River into the Jefferson River starts to add to the impacts on how fast the river guage on the Jefferson River near Three Forks goes up/down. (June 2017)
Highest crests on record
- 12.3 ft — May 22, 1981
- 10.9 ft — June 9, 1964
- 10.9 ft — June 19, 1975
- 10.37 ft — May 22, 1948
- 10.24 ft — May 28, 1938
Recent crests: 7.78 ft (April 27, 2012) · 10.15 ft (June 7, 2011) · 9.14 ft (June 17, 2010) · 8.41 ft (May 30, 2009) · 7.79 ft (June 15, 2008)
Up and down the river, and nearby
- DownstreamJefferson River near Three Forks, MT
- Prickly Pear Creek near Clancy, MT
- Tenmile Creek (MT) near Rimini, MT
- Blacktail Creek above Grove Gulch at Butte, MT
- Tenmile Creek (MT) near Helena, MT
- Jefferson River near Silver Star at Parsons Bridge, MT
- Missouri River at Toston, MT
- Silver Bow Creek at Warm Springs MT, MT
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BLDM8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.