Rivermatics

USGS Streamgage 09060770

Rock Creek at McCoy, CO

Rock Creek at McCoy, CO is USGS streamgage 09060770 in Colorado, monitoring river discharge in hydrologic subbasin 14010001. It drains a watershed of about 198 square miles. Discharge records at this site go back to 1983. Typical flow runs near 17.9 cfs in July and 94.6 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
198 sq mi
Gauge elevation
6,690 ft
Subbasin (HUC-8)
14010001
Coordinates
39.91394, -106.72731
USGS site number
09060770
Records begin
1983-10-01 (43 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Rock Creek at McCoy, 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
3.9 4.2 4.6
3.6 4 4.5
3.4 4.1 5
3.5 4.5 6.7
3.6 4.7 7.1
3.6 5.2 9
4.1 6.3 13.6
4.3 6.7 12.6
4.1 6.4 11.1
3.8 5.9 10.5
3.6 5.6 9.6
3.4 5.3 8.7
3.2 5.1 8.3
3.1 4.9 8

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 43 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 10.8 20.1 30.8
February 13.7 21 31.2
March 20.1 29.2 60.8
April 40.3 94.6 276.3
May 71 226.1 688.7
June 15.7 93.2 282.4
July 4.9 17.9 69.5
August 3.3 15.5 55.6
September 5.1 15.7 52.8
October 10.5 19.5 51.1
November 15 24.7 45.5
December 13 19.5 37.1

All values in cubic feet per second (cfs).

Common questions

When does Rock Creek at McCoy, CO normally run highest?
May, on the long-term record. The median daily flow that month is about 226.1 cfs, against 15.5 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Rock Creek at McCoy, CO?
It depends on the month. In January, half of days historically fall near 20.1 cfs, with the middle 80% of days between 10.8 and 30.8 cfs. The month-by-month table on this page gives the full range.
How long has Rock Creek at McCoy, CO been measured?
Discharge records at USGS site 09060770 begin in 1983, about 43 years, covering roughly 637 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Rock Creek at McCoy, 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 Rock Creek at McCoy, CO?
The gauge sits at 39.91394, -106.72731, in Colorado, in hydrologic subbasin 14010001, at an elevation of about 6,690 feet, draining roughly 198 square miles.
Can I use Rock Creek at McCoy, 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