Rivermatics

USGS Streamgage 14138900

North Fork Bull Run River near Multnomah Falls, OR

North Fork Bull Run River near Multnomah Falls, OR is USGS streamgage 14138900 in Oregon, monitoring river discharge in hydrologic subbasin 17080001. It drains a watershed of about 8 square miles. Discharge records at this site go back to 1965. Typical flow runs near 19.4 cfs in July and 75.3 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Oregon
Drainage area
8 sq mi
Subbasin (HUC-8)
17080001
Coordinates
45.49425, -122.03589
USGS site number
14138900
Records begin
1965-08-01 (61 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for North Fork Bull Run River near Multnomah Falls, OR. 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
8.9 9.2 9.4
9.2 9.9 11.7
9.6 10.9 15
9.2 10.1 12.4
8.9 9.5 10.5
8.7 9.2 9.9
8.6 9.1 9.7
8.5 8.9 9.5
8.4 8.8 9.3
8.3 8.8 9.3
8.2 8.7 9.2
8.2 8.7 9.2
8.1 8.6 9.2
8.1 8.6 9.2

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 61 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 32.8 78.7 290.7
February 32 68.1 230
March 36.4 71.3 181.4
April 43.2 75.3 156
May 30 61.1 134.3
June 18.9 35.8 92.7
July 13.2 19.4 35.4
August 10.6 14.1 22.9
September 10 14.3 37.9
October 11.6 25.9 98.5
November 24.8 72.7 235.6
December 31.7 77.9 307.5

All values in cubic feet per second (cfs).

Common questions

When does North Fork Bull Run River near Multnomah Falls, OR normally run highest?
January, on the long-term record. The median daily flow that month is about 78.7 cfs, against 14.1 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 North Fork Bull Run River near Multnomah Falls, OR?
It depends on the month. In January, half of days historically fall near 78.7 cfs, with the middle 80% of days between 32.8 and 290.7 cfs. The month-by-month table on this page gives the full range.
How long has North Fork Bull Run River near Multnomah Falls, OR been measured?
Discharge records at USGS site 14138900 begin in 1965, about 61 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 North Fork Bull Run River near Multnomah Falls, OR?
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. A companion model forecasts each day's water-temperature high and low. 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 North Fork Bull Run River near Multnomah Falls, OR?
The gauge sits at 45.49425, -122.03589, in Oregon, in hydrologic subbasin 17080001, draining roughly 8 square miles.
Can I use North Fork Bull Run River near Multnomah Falls, OR 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.

Other gauges in this subbasin