Tenmile Creek (MT) near Helena, MT
River level and flood forecast · Lewis and Clark County
Normal2.3 ftas of Mon 2:15 PM
The river is 2.2 ft below flood stage (4.5 ft).
Flow: 7 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 | 6 ft |
| Moderate flood stage | 5 ft |
| Flood stage | 4.5 ft |
| Action stage | 4 ft |
| Record crest (June 20, 2018) | 5.5 ft |
What floods at each level
From the National Weather Service, highest first.
- 5.5 ftAt 5.5 feet June 20 2018 - Flooding went out to Rossiter Elementary School. It took about 1 day for the water to get there. Parking lot on the north side of the school was filling with water. Some roads closed between Tenmile Creek and Sierra Road.
- 5 ftMay 2018 - At 5.0 Feet, after several days of flooding, impacts increase around Sierra Road, (Over 2 miles away from Tenmile Creek.) Impacts increase significantly for each 0.1 inch of creek rise, as water runs downhill into the valley. Flooding as far north as 2 miles north of Sierra Rd on Montana Ave. Rainfall of 0.50 to 1.00 inches in the past 2 days as well. Pumps used by Rossiter School. Water transffered to trap club.
- 4.7 ftMay 2018, At 4.7 feet flooding has spread out to Sierra Road. Sandbag the middle of Sierra Rd from MT Ave to I-15. Sandbag around Rossiter School. Flooding of Helena Campground and RV Park.
- 4.5 ftAt 4.5 Feet - April 28 2018 - Flooding from Tenmile Creek starts to impact roads around Mill, Stadler, Edgerton Roads, McHugh Drive (1 mile north of creek). Some basements flood. Further east, water starts to come out of its bank near I-15. This was all from snowmelt - no rainfall. Temperature hit 85 degrees previous afternoon.
- 4.4 ftJune 1 2018 - Water escaped in low lying areas along Tenmile Creek. Minor flooding around Mchugh, Mill, and Edgerton roads. Mostly from 1 inch of rain in the past day and some higher elevation snow melt as well.
- 4 ftAction Stage
- 3.9 ftApril 2018 - Tenmile Creek came out of its bank at 3.9 feet on the west side of Helena at the Green Meadow Country Club.
Highest crests on record
- 5.5 ft — June 20, 2018
- 5.03 ft — May 11, 2018
- 4.68 ft — May 7, 2018
- 4.57 ft — June 9, 2023
- 4.56 ft — April 29, 2018
Recent crests: 4.57 ft (June 9, 2023) · 4.14 ft (May 5, 2023) · 5.5 ft (June 20, 2018) · 4.42 ft (June 1, 2018) · 5.03 ft (May 11, 2018)
Up and down the river, and nearby
- UpstreamTenmile Creek (MT) near Rimini, MT
- DownstreamMissouri River below Hauser Dam near Helena, MT
- Prickly Pear Creek near Clancy, MT
- Missouri River below Holter Dam near Wolf Creek, MT
- Boulder River (Central MT) near Boulder, MT
- Little Prickly Pear Creek at Wolf Creek, MT
- Little Blackfoot River near Garrison 1SE, MT
- Clark Fork River at Deer Lodge, MT
See it on the live map →Radar & warnings for Lewis and Clark CountyNWS gauge pageUSGS gauge 06063000
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (TMHM8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.