Colorado River below Lake Granby, CO

Gauge details

State

Colorado

Drainage area

312 sq mi

Gauge elevation

8,066 ft

Subbasin (HUC-8)

14010001

Coordinates

40.14417, -105.86667

USGS site number

09019000

Records begin

1951-06-13 (75 years)

Rivermatics forecast

14-day flow outlook

14-day flow forecast

Based on observations through September 10 for Colorado River below Lake Granby, 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.

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 8 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

All values in cubic feet per second (cfs).

Common questions

When does Colorado River below Lake Granby, CO normally run highest?

June, on the long-term record. The median daily flow that month is about 95.3 cfs, against 19.3 cfs in March, the lowest month. These are historical normals for the date, not a forecast and not today's reading.

How long has Colorado River below Lake Granby, CO been measured?

Discharge records at USGS site 09019000 begin in 1951, about 75 years, covering roughly 2,788 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.

Is there a flow forecast for Colorado River below Lake Granby, 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 Colorado River below Lake Granby, CO?

The gauge sits at 40.14417, -105.86667, in Colorado, in hydrologic subbasin 14010001, at an elevation of about 8,066 feet, draining roughly 312 square miles.

Can I use Colorado River below Lake Granby, 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 Colorado River

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

• Colorado River below Baker Gulch near Grand Lake, CO 64 sq mi
• Colorado River below Shadow Mountain Reservoir, CO 190 sq mi
• Colorado River below Lake Granby, CO this page
• Colorado River near Granby, CO 323 sq mi
• Colorado River at Windy Gap, near Granby, CO 788 sq mi
• Colorado River near Kremmling, CO 2,379 sq mi
• Colorado River at Catamount Bridge, CO 2,930 sq mi
• Colorado River near Dotsero, CO 4,390 sq mi
• Colorado River above Glenwood Springs, CO 4,556 sq mi
• Colorado River above Roaring Fork River at Glenwood Springs, CO 4,560 sq mi
• Colorado River below Glenwood Springs, CO 6,014 sq mi
• Colorado River below South Canyon Creek near Glenwood Springs, CO 6,050 sq mi
• Colorado River near Cameo, CO 7,986 sq mi
• Colorado River near Colorado-Utah State Line 17,849 sq mi
• Colorado River near Cisco, UT 24,100 sq mi
• Colorado River at Potash, UT 25,406 sq mi
• Colorado River at Gypsum Canyon near Hite, UT 71,200 sq mi
• Colorado River Ab Dirty Devil River near Hite, UT 75,530 sq mi
• Colorado River at Lees Ferry, AZ 111,800 sq mi
• Colorado River above Little Colorado River near Desert View 114,272 sq mi
• Colorado River near Grand Canyon, AZ 141,600 sq mi
• Colorado River above National Canyon near Supai 147,931 sq mi
• Colorado River below Hoover Dam, Az-Nv 171,700 sq mi
• Colorado River below Palo Verde Dam, Az-Ca 182,200 sq mi
• Colorado River above Imperial Dam, Az-Ca 188,500 sq mi
• Colorado River below Imperial Dam, Az-Ca 188,500 sq mi
• Colorado River below Laguna Dam, Az-Ca 188,600 sq mi
• Colorado River below Yuma Main Canal Ww at Yuma, AZ 246,500 sq mi
• Colorado River at Nib, above Morelos Dam, AZ 246,700 sq mi
• Colorado River below Cooper Wasteway near Yuma, AZ
• Colorado River. above Gunnison River. at Grand Junction, CO

Other gauges in this subbasin

• Colorado River near Granby, CO
• Willow Creek below Cabin Creek near Granby, CO
• Willow Creek above Willow Creek Reservoir, CO
• Willow Creek below Willow Creek Reservoir, CO
• Fraser River at Upper Sta, near Winter Park, CO
• Fraser River at Moffat Tunnel at Winter Park, CO
• Fraser River below Moffat Tunnel at Winter Park, CO
• Fraser River at Winter Park, CO