USGS Streamgage 10336610
Upper Truckee River at South Lake Tahoe, CA
Upper Truckee River at South Lake Tahoe, CA is USGS streamgage 10336610 in California, monitoring river discharge in hydrologic subbasin 16050101. It sits on the Upper Truckee River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 55 square miles. Discharge records at this site go back to 1971. Typical flow runs near 27 cfs in July and 147.7 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, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- California
- Drainage area
- 55 sq mi
- Gauge elevation
- 6,229 ft
- Subbasin (HUC-8)
- 16050101
- Coordinates
- 38.92241, -119.99157
- USGS site number
- 10336610
- Records begin
- 1971-10-01 (55 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Upper Truckee River at South Lake Tahoe, CA. 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.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 3.5 | 3.8 | 4.1 | ||
| 3.4 | 3.8 | 4.2 | ||
| 3.3 | 3.8 | 4.3 | ||
| 3.3 | 3.8 | 4.5 | ||
| 3.2 | 3.7 | 4.5 | ||
| 3.1 | 3.7 | 4.8 | ||
| 3.1 | 3.7 | 4.8 | ||
| 3.1 | 3.7 | 5 | ||
| 3 | 3.7 | 4.8 | ||
| 3 | 3.7 | 5.3 | ||
| 3.2 | 4.1 | 6 | ||
| 3.2 | 4.1 | 6.3 | ||
| 3.1 | 4 | 5.9 | ||
| 3 | 4 | 6 |
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 55 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 13.6 | 30.5 | 127.5 | |
| February | 18.7 | 43.1 | 112.7 | |
| March | 34.9 | 77.9 | 187.3 | |
| April | 75.6 | 147.7 | 309.8 | |
| May | 99.6 | 245.1 | 597.1 | |
| June | 36.5 | 165.5 | 579.6 | |
| July | 6.3 | 27 | 219.1 | |
| August | 2 | 7.6 | 42.3 | |
| September | 1.8 | 7.2 | 23.2 | |
| October | 3.8 | 10.8 | 29.9 | |
| November | 7.8 | 16.3 | 76.4 | |
| December | 11.1 | 22.2 | 104.7 |
All values in cubic feet per second (cfs).
Common questions
- When does Upper Truckee River at South Lake Tahoe, CA normally run highest?
- May, on the long-term record. The median daily flow that month is about 245.1 cfs, against 7.2 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Upper Truckee River at South Lake Tahoe, CA?
- It depends on the month. In January, half of days historically fall near 30.5 cfs, with the middle 80% of days between 13.6 and 127.5 cfs. The month-by-month table on this page gives the full range.
- How long has Upper Truckee River at South Lake Tahoe, CA been measured?
- Discharge records at USGS site 10336610 begin in 1971, about 55 years, covering roughly 9,131 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Upper Truckee River at South Lake Tahoe, CA?
- 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 Upper Truckee River at South Lake Tahoe, CA?
- The gauge sits at 38.92241, -119.99157, in California, in hydrologic subbasin 16050101, at an elevation of about 6,229 feet, draining roughly 55 square miles.
- Can I use Upper Truckee River at South Lake Tahoe, CA 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 Upper Truckee River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Upper Truckee River in full.
- Upper Truckee River at Hwy 50 above Meyers, CA 39 sq mi
- Upper Truckee River at South Lake Tahoe, CA this page