USGS Streamgage 10312150
Carson River below Lahontan Reservoir near Fallon, NV
Carson River below Lahontan Reservoir near Fallon, NV is USGS streamgage 10312150 in Nevada, monitoring river discharge in hydrologic subbasin 16050203. It sits on the Carson River, alongside 7 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,801 square miles. Discharge records at this site go back to 1966. Typical flow runs near 865.6 cfs in July and 603.8 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.
View live conditions & forecast →
Gauge details
- State
- Nevada
- Drainage area
- 1,801 sq mi
- Gauge elevation
- 4,040 ft
- Subbasin (HUC-8)
- 16050203
- Coordinates
- 39.46394, -119.04626
- USGS site number
- 10312150
- Records begin
- 1966-10-01 (60 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Carson River below Lahontan Reservoir near Fallon, NV. 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 |
|---|---|---|---|---|
| 471 | 515 | 536 | ||
| 418 | 500 | 542 | ||
| 378 | 485 | 550 | ||
| 329 | 474 | 564 | ||
| 274 | 467 | 578 | ||
| 214 | 462 | 595 | ||
| 180 | 461 | 615 | ||
| 149 | 458 | 630 | ||
| 133 | 453 | 639 | ||
| 111 | 440 | 647 | ||
| 82.4 | 421 | 660 | ||
| 66.1 | 412 | 685 | ||
| 61 | 399 | 681 | ||
| 58.6 | 381 | 666 |
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 60 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 | 1.1 | 3.2 | 187.1 | |
| February | 1.2 | 3.5 | 532.6 | |
| March | 1.6 | 95.2 | 823.9 | |
| April | 248.5 | 603.8 | 1,304.6 | |
| May | 423.2 | 793.1 | 1,484.5 | |
| June | 537 | 828.3 | 1,506.7 | |
| July | 638.9 | 865.6 | 1,104.4 | |
| August | 529.9 | 796.1 | 993.2 | |
| September | 208.3 | 606.6 | 789.1 | |
| October | 1.5 | 351.2 | 515.7 | |
| November | 1 | 124.1 | 218.3 | |
| December | 1.1 | 3.4 | 7.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Carson River below Lahontan Reservoir near Fallon, NV normally run highest?
- July, on the long-term record. The median daily flow that month is about 865.6 cfs, against 3.2 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 Carson River below Lahontan Reservoir near Fallon, NV?
- It depends on the month. In January, half of days historically fall near 3.2 cfs, with the middle 80% of days between 1.1 and 187.1 cfs. The month-by-month table on this page gives the full range.
- How long has Carson River below Lahontan Reservoir near Fallon, NV been measured?
- Discharge records at USGS site 10312150 begin in 1966, about 60 years, covering roughly 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Carson River below Lahontan Reservoir near Fallon, NV?
- 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 Carson River below Lahontan Reservoir near Fallon, NV?
- The gauge sits at 39.46394, -119.04626, in Nevada, in hydrologic subbasin 16050203, at an elevation of about 4,040 feet, draining roughly 1,801 square miles.
- Can I use Carson River below Lahontan Reservoir near Fallon, NV 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 Carson River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Carson River in full.
- Carson River near Genoa, NV 672 sq mi
- Carson River near Carson City, NV 886 sq mi
- Carson River at Deer Run Rd near Carson City, NV 958 sq mi
- Carson River at Dayton, NV 1,090 sq mi
- Carson River above Sixmile Cyn Creek below Dayton, NV 1,121 sq mi
- Carson River near Fort Churchill, NV 1,302 sq mi
- Carson River below Lahontan Reservoir near Fallon, NV this page
- Carson River at Tarzyn Rd near Fallon, NV