Rivermatics

USGS Streamgage 09128000

Gunnison River below Gunnison Tunnel, CO

Gunnison River below Gunnison Tunnel, CO is USGS streamgage 09128000 in Colorado, monitoring river discharge in hydrologic subbasin 14020002. It sits on the Gunnison River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 3,971 square miles. Discharge records at this site go back to 1906. Typical flow runs near 889.8 cfs in July and 738.9 cfs in April, with the higher of the two arriving in July. 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
3,971 sq mi
Gauge elevation
6,542 ft
Subbasin (HUC-8)
14020002
Coordinates
38.52915, -107.64895
USGS site number
09128000
Records begin
1906-06-13 (120 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Gunnison River below Gunnison Tunnel, 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
235 246 253
231 245 254
229 246 259
221 248 267
213 248 279
207 249 290
202 247 326
204 248 367
196 248 378
189 247 376
185 247 381
176 247 378
182 247 407
166 246 377

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 116 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 322.5 471.6 1,764.5
February 324 495.7 1,725.9
March 323 604.4 1,780.6
April 260.7 738.9 2,645
May 330.1 2,041.6 6,633.5
June 343.4 2,498.3 8,387
July 198.5 889.8 3,395.2
August 143.7 593.7 1,463.5
September 37.4 454 1,183.3
October 70.2 428 1,245.5
November 264.7 576.2 1,561.7
December 324.9 498.9 1,782.6

All values in cubic feet per second (cfs).

Common questions

When does Gunnison River below Gunnison Tunnel, CO normally run highest?
June, on the long-term record. The median daily flow that month is about 2,498.3 cfs, against 428 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Gunnison River below Gunnison Tunnel, CO?
It depends on the month. In January, half of days historically fall near 471.6 cfs, with the middle 80% of days between 322.5 and 1,764.5 cfs. The month-by-month table on this page gives the full range.
How long has Gunnison River below Gunnison Tunnel, CO been measured?
Discharge records at USGS site 09128000 begin in 1906, about 120 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 Gunnison River below Gunnison Tunnel, 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 Gunnison River below Gunnison Tunnel, CO?
The gauge sits at 38.52915, -107.64895, in Colorado, in hydrologic subbasin 14020002, at an elevation of about 6,542 feet, draining roughly 3,971 square miles.
Can I use Gunnison River below Gunnison Tunnel, 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 Gunnison River

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

Other gauges in this subbasin