Rivermatics

USGS Streamgage 09346400

San Juan River near Carracas, CO

San Juan River near Carracas, CO is USGS streamgage 09346400 in Colorado, monitoring river discharge in hydrologic subbasin 14080101. It sits on the San Juan River, alongside 9 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,250 square miles. Discharge records at this site go back to 1961. Typical flow runs near 338.2 cfs in July and 797.3 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
1,250 sq mi
Gauge elevation
6,092 ft
Subbasin (HUC-8)
14080101
Coordinates
37.01362, -107.31228
USGS site number
09346400
Records begin
1961-11-01 (65 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for San Juan River near Carracas, 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
11.8 13.3 14.8
10.9 12.9 15.7
10.2 12.9 18.4
10.6 14.7 26.9
12.8 22 68.9
18.2 45.8 192
21.8 67.1 258
22.3 64.6 205
21.8 54.3 154
20.9 48.5 143
20.9 47.5 128
19.1 41.1 106
17.3 35.9 91.2
15.9 32.4 81.7

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 56 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 86.6 137.3 249.6
February 96.8 158.7 318.3
March 157.8 420.2 1,095.1
April 361.9 797.3 1,804.7
May 684.6 1,431 2,816.1
June 287.6 1,253.9 3,089
July 100.7 338.2 1,178.1
August 62.6 227.6 549.3
September 65.9 184.9 554.5
October 97.9 193 583.9
November 103.9 174.4 352.6
December 87.7 141.5 286.6

All values in cubic feet per second (cfs).

Common questions

When does San Juan River near Carracas, CO normally run highest?
May, on the long-term record. The median daily flow that month is about 1,431 cfs, against 137.3 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 San Juan River near Carracas, CO?
It depends on the month. In January, half of days historically fall near 137.3 cfs, with the middle 80% of days between 86.6 and 249.6 cfs. The month-by-month table on this page gives the full range.
How long has San Juan River near Carracas, CO been measured?
Discharge records at USGS site 09346400 begin in 1961, about 65 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 San Juan River near Carracas, 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 San Juan River near Carracas, CO?
The gauge sits at 37.01362, -107.31228, in Colorado, in hydrologic subbasin 14080101, at an elevation of about 6,092 feet, draining roughly 1,250 square miles.
Can I use San Juan River near Carracas, 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 San Juan River

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

Other gauges in this subbasin