Rivermatics

USGS Streamgage 14182500

Little North Santiam River near Mehama, OR

Little North Santiam River near Mehama, OR is USGS streamgage 14182500 in Oregon, monitoring river discharge in hydrologic subbasin 17090005. It drains a watershed of about 112 square miles. Discharge records at this site go back to 1931. Typical flow runs near 102.9 cfs in July and 844.3 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
112 sq mi
Subbasin (HUC-8)
17090005
Coordinates
44.79151, -122.57897
USGS site number
14182500
Records begin
1931-10-01 (95 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Little North Santiam River near Mehama, 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
51.5 53.5 55.3
51.3 55.2 61.9
55.1 65 92.2
54.2 64.8 92.6
51.5 59.1 75.8
48.8 55 68.4
46.8 52.1 61.7
45.4 50.2 57.9
44.4 49.1 55.9
43.5 48.2 54.6
42.5 47.1 53
41.9 46.6 52.5
41.3 46 51.7
40.8 45.7 51.7

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 95 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 326.2 860.1 2,896.1
February 320.9 749.4 2,427.6
March 365.2 811.3 2,033.5
April 428 844.3 1,669
May 286.5 664.3 1,379.7
June 123.1 321.8 919.1
July 52.4 102.9 211.9
August 30.2 44.9 87.4
September 26.2 41.9 226.6
October 34.1 150.4 1,004.3
November 163.8 704.5 2,539.3
December 304.1 884.7 3,220

All values in cubic feet per second (cfs).

Common questions

When does Little North Santiam River near Mehama, OR normally run highest?
December, on the long-term record. The median daily flow that month is about 884.7 cfs, against 41.9 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Little North Santiam River near Mehama, OR?
It depends on the month. In January, half of days historically fall near 860.1 cfs, with the middle 80% of days between 326.2 and 2,896.1 cfs. The month-by-month table on this page gives the full range.
How long has Little North Santiam River near Mehama, OR been measured?
Discharge records at USGS site 14182500 begin in 1931, about 95 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 Little North Santiam River near Mehama, 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 Little North Santiam River near Mehama, OR?
The gauge sits at 44.79151, -122.57897, in Oregon, in hydrologic subbasin 17090005, draining roughly 112 square miles.
Can I use Little North Santiam River near Mehama, 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