Rivermatics

USGS Streamgage 09014050

Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO

Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO is USGS streamgage 09014050 in Colorado, monitoring river discharge in hydrologic subbasin 14010001. It drains a watershed of about 76 square miles. Discharge records at this site go back to 2010. Typical flow runs near -197 cfs in July and -318.1 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Colorado
Drainage area
76 sq mi
Gauge elevation
8,373 ft
Subbasin (HUC-8)
14010001
Coordinates
40.24611, -105.82883
USGS site number
09014050
Records begin
2010-04-09 (16 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Grand Lake Outlet below Chipmunk Ln at Grand Lake, 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
0 0 0
0 0 0
0 0 0.1
0 0 0.1
0 0 0
0 0 0.1
0 0 0.1
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0

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 16 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 — -453.3 —
February -565 -502.3 -128
March -553.8 -420.6 -127.7
April -532.1 -318.1 53.3
May -347 -39.8 392.1
June -83.1 452.4 952.3
July -411.5 -197 359.9
August -510.7 -331.1 61.9
September -521.9 -308.9 19.1
October — -160.2 —
November — 4.1 —
December — -247.5 —

All values in cubic feet per second (cfs).

Common questions

When does Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO normally run highest?
June, on the long-term record. The median daily flow that month is about 452.4 cfs, against -502.3 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO?
It depends on the month. In February, half of days historically fall near -502.3 cfs, with the middle 80% of days between -565 and -128 cfs. The month-by-month table on this page gives the full range.
How long has Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO been measured?
Discharge records at USGS site 09014050 begin in 2010, about 16 years, covering roughly 4,753 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Grand Lake Outlet below Chipmunk Ln at Grand Lake, 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. 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 Grand Lake Outlet below Chipmunk Ln at Grand Lake, CO?
The gauge sits at 40.24611, -105.82883, in Colorado, in hydrologic subbasin 14010001, at an elevation of about 8,373 feet, draining roughly 76 square miles.
Can I use Grand Lake Outlet below Chipmunk Ln at Grand Lake, 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.

Other gauges in this subbasin