Rivermatics

USGS Streamgage 10295000

E Walker River near Mason, NV

E Walker River near Mason, NV is USGS streamgage 10295000 in Nevada, monitoring river discharge in hydrologic subbasin 16050301. It sits on the E Walker River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,230 square miles. Discharge records at this site go back to 1910. Typical flow runs near 59.2 cfs in July and 44.1 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.

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Gauge details

State
Nevada
Drainage area
1,230 sq mi
Gauge elevation
4,463 ft
Subbasin (HUC-8)
16050301
Coordinates
38.8774, -119.14428
USGS site number
10295000
Records begin
1910-12-01 (116 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for E Walker River near Mason, 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.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
82.9 93.6 104
71.3 91.1 107
54.7 84.1 105
44.1 78.4 103
37.4 73.8 101
31.9 69.6 98.1
31.4 68.6 98.2
31.3 67.5 97.8
28.4 64.7 96.1
21.5 59 92.6
21.6 60.4 96.4
22 62.4 99.9
25.5 64.5 100
23.6 61.2 97.1

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 116 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 14.1 45.6 223.5
February 22 68 230.4
March 17.1 76.1 406.8
April 9.3 44.1 674.1
May 3 42.8 980.7
June 1.4 80.7 1,263.2
July 3.3 59.2 802
August 7.7 44.3 302
September 4.7 41.3 140.5
October 9.3 37.2 120.4
November 14.8 40 124.8
December 12.8 36.9 97.3

All values in cubic feet per second (cfs).

Common questions

When does E Walker River near Mason, NV normally run highest?
June, on the long-term record. The median daily flow that month is about 80.7 cfs, against 36.9 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for E Walker River near Mason, NV?
It depends on the month. In January, half of days historically fall near 45.6 cfs, with the middle 80% of days between 14.1 and 223.5 cfs. The month-by-month table on this page gives the full range.
How long has E Walker River near Mason, NV been measured?
Discharge records at USGS site 10295000 begin in 1910, about 116 years, covering roughly 3,063 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for E Walker River near Mason, 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 E Walker River near Mason, NV?
The gauge sits at 38.8774, -119.14428, in Nevada, in hydrologic subbasin 16050301, at an elevation of about 4,463 feet, draining roughly 1,230 square miles.
Can I use E Walker River near Mason, 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 E Walker River

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

Other gauges in this subbasin