Rivermatics

USGS Streamgage 12334550

Clark Fork at Turah Bridge near Bonner, MT

Clark Fork at Turah Bridge near Bonner, MT is USGS streamgage 12334550 in Montana, monitoring river discharge in hydrologic subbasin 17010202. It sits on the Clark Fork, alongside 12 other gauges Rivermatics tracks on the same river. It drains a watershed of about 3,657 square miles. Discharge records at this site go back to 1984. Typical flow runs near 1,102.5 cfs in July and 1,435.3 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.

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Gauge details

State
Montana
Drainage area
3,657 sq mi
Gauge elevation
3,321 ft
Subbasin (HUC-8)
17010202
Coordinates
46.82591, -113.81403
USGS site number
12334550
Records begin
1984-10-01 (42 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Clark Fork at Turah Bridge near Bonner, 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 Range
791 824 862
761 814 875
737 799 875
712 780 862
689 761 844
674 752 850
663 744 844
646 730 836
630 717 826
618 706 819
607 694 807
598 687 803
592 685 810
586 681 815

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 41 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 Range
January 478 724.1 977.8
February 527.6 751.8 1,140.4
March 680.5 955.5 1,611.9
April 874.1 1,435.3 2,630.7
May 1,306.2 2,570 5,639.4
June 1,209.8 2,831.3 5,649.7
July 636.2 1,102.5 2,638.7
August 358.3 570.9 1,103.1
September 402.1 638.3 1,047.5
October 626.2 850.2 1,187.1
November 651.3 837.8 1,196.3
December 504.2 749.2 995.3

All values in cubic feet per second (cfs).

Common questions

When does Clark Fork at Turah Bridge near Bonner, MT normally run highest?
June, on the long-term record. The median daily flow that month is about 2,831.3 cfs, against 570.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Clark Fork at Turah Bridge near Bonner, MT?
It depends on the month. In January, half of days historically fall near 724.1 cfs, with the middle 80% of days between 478 and 977.8 cfs. The month-by-month table on this page gives the full range.
How long has Clark Fork at Turah Bridge near Bonner, MT been measured?
Discharge records at USGS site 12334550 begin in 1984, about 42 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Clark Fork at Turah Bridge near Bonner, 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 Clark Fork at Turah Bridge near Bonner, MT?
The gauge sits at 46.82591, -113.81403, in Montana, in hydrologic subbasin 17010202, at an elevation of about 3,321 feet, draining roughly 3,657 square miles.
Can I use Clark Fork at Turah Bridge near Bonner, 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 Clark Fork

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

Other gauges in this subbasin