Rivermatics

USGS Streamgage 09132500

North Fork Gunnison River near Somerset, CO

North Fork Gunnison River near Somerset, CO is USGS streamgage 09132500 in Colorado, monitoring river discharge in hydrologic subbasin 14020004. It sits on the North Fork Gunnison River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 525 square miles. Discharge records at this site go back to 1933. Typical flow runs near 324.6 cfs in July and 576.4 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
Colorado
Drainage area
525 sq mi
Gauge elevation
6,093 ft
Subbasin (HUC-8)
14020004
Coordinates
38.92582, -107.43422
USGS site number
09132500
Records begin
1933-10-01 (93 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for North Fork Gunnison River near Somerset, CO. 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
25.7 28 30.3
24.9 27.5 30.2
24.4 27.4 31.5
23.8 29.5 77.1
25.2 31.2 136
24.8 32.5 135
26.4 35.7 141
25.8 32.6 138
25.1 31.3 128
24.5 30.4 137
24 29.9 132
23.6 29.4 141
23.2 29.1 136
23 28.9 106

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 93 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 38.1 60.3 94.2
February 39.2 62.6 105.7
March 61.2 113.1 310.1
April 229.6 576.4 1,381.3
May 705.7 1,647.4 3,212.9
June 470.5 1,211.9 2,600.3
July 183.5 324.6 867.7
August 86 225.9 279.5
September 58.8 149.9 246.8
October 52.7 83.9 211.7
November 47.2 76.1 149.9
December 41.7 63.7 113.7

All values in cubic feet per second (cfs).

Common questions

When does North Fork Gunnison River near Somerset, CO normally run highest?
May, on the long-term record. The median daily flow that month is about 1,647.4 cfs, against 60.3 cfs in January, 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 Gunnison River near Somerset, CO?
It depends on the month. In January, half of days historically fall near 60.3 cfs, with the middle 80% of days between 38.1 and 94.2 cfs. The month-by-month table on this page gives the full range.
How long has North Fork Gunnison River near Somerset, CO been measured?
Discharge records at USGS site 09132500 begin in 1933, about 93 years, covering roughly 9,200 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 Gunnison River near Somerset, CO?
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 North Fork Gunnison River near Somerset, CO?
The gauge sits at 38.92582, -107.43422, in Colorado, in hydrologic subbasin 14020004, at an elevation of about 6,093 feet, draining roughly 525 square miles.
Can I use North Fork Gunnison River near Somerset, CO 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 North Fork Gunnison River

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

Other gauges in this subbasin