When does Beaver Creek at Reservoir Bndry near Rocky Boy, MT normally run highest?

June, on the long-term record. The median daily flow that month is about 13.9 cfs, against 1.4 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.

Is there a flow forecast for Beaver Creek at Reservoir Bndry near Rocky Boy, MT?

Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.

Where is Beaver Creek at Reservoir Bndry near Rocky Boy, MT?

The gauge sits at 48.22408, -109.65227, in Montana, in hydrologic subbasin 10050004, at an elevation of about 4,171 feet, draining roughly 16 square miles.

Can I use Beaver Creek at Reservoir Bndry near Rocky Boy, MT data for flood or safety decisions?

No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

USGS Streamgage 06139900

Beaver Creek at Reservoir Bndry near Rocky Boy, MT

Beaver Creek at Reservoir Bndry near Rocky Boy, MT is USGS streamgage 06139900 in Montana, monitoring river discharge in hydrologic subbasin 10050004. It sits on the Beaver Creek, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 16 square miles. Discharge records at this site go back to 2001. Typical flow runs near 5.5 cfs in July and 6.8 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State: Montana
Drainage area: 16 sq mi
Gauge elevation: 4,171 ft
Subbasin (HUC-8): 10050004
Coordinates: 48.22408, -109.65227
USGS site number: 06139900
Records begin: 2001-07-01 (25 years)
Rivermatics forecast: 14-day flow outlook

14-day flow forecast

Based on observations through September 10 for Beaver Creek at Reservoir Bndry near Rocky Boy, MT. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date	Low p10	Expected p50	High p90
September 11	6.1	7	9.2
September 12	6.1	7.5	13.6
September 13	5.6	6.9	10.1
September 14	5.4	6.6	10.2
September 15	5.2	6.3	8.9
September 16	5.5	7.3	16.5
September 17	5.1	6.6	11.5
September 18	4.8	6.3	10.3
September 19	4.5	5.9	9.3
September 20	4.3	5.7	8.7
September 21	4.2	5.5	8.2
September 22	4.1	5.4	8
September 23	4.1	5.3	7.8
September 24	3.9	5.2	7.6

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 25 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month	Low p10	Typical p50	High p90
January	—	1.5	—
February	—	1.4	—
March	—	4.5	—
April	—	6.8	—
May	—	11.2	—
June	—	13.9	—
July	—	5.5	—
August	—	3.6	—
September	—	2.6	—
October	—	2.6	—
November	—	2.3	—
December	—	1.5	—

All values in cubic feet per second (cfs).

Common questions

When does Beaver Creek at Reservoir Bndry near Rocky Boy, MT normally run highest?: June, on the long-term record. The median daily flow that month is about 13.9 cfs, against 1.4 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Beaver Creek at Reservoir Bndry near Rocky Boy, MT been measured?: Discharge records at USGS site 06139900 begin in 2001, about 25 years, covering roughly 2,154 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Beaver Creek at Reservoir Bndry near Rocky Boy, MT?: Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Beaver Creek at Reservoir Bndry near Rocky Boy, MT?: The gauge sits at 48.22408, -109.65227, in Montana, in hydrologic subbasin 10050004, at an elevation of about 4,171 feet, draining roughly 16 square miles.
Can I use Beaver Creek at Reservoir Bndry near Rocky Boy, MT data for flood or safety decisions?: No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Beaver Creek

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Beaver Creek in full.

Beaver Creek ab Elk Creek, near Rocky Boy, MT 9 sq mi
Beaver Creek at Reservoir Bndry near Rocky Boy, MT this page