Rivermatics

USGS Streamgage 10249300

S Twin River near Round Mountain, NV

S Twin River near Round Mountain, NV is USGS streamgage 10249300 in Nevada, monitoring river discharge in hydrologic subbasin 16060004. It drains a watershed of about 20 square miles. Discharge records at this site go back to 1965. Typical flow runs near 3.8 cfs in July and 6.9 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
Nevada
Drainage area
20 sq mi
Gauge elevation
6,400 ft
Subbasin (HUC-8)
16060004
Coordinates
38.88743, -117.24537
USGS site number
10249300
Records begin
1965-08-05 (61 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 61 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 1.1 2 3.5
February 1.2 2.4 4.7
March 1.6 3.7 8.5
April 2.8 6.9 21.1
May 3.9 14.9 54.3
June 2.6 10.9 46.6
July 1 3.8 11.7
August 0.6 1.7 6
September 0.6 1.5 4.1
October 1.1 2 3.6
November 1.3 2.1 4
December 1.2 2 3.6

All values in cubic feet per second (cfs).

Common questions

When does S Twin River near Round Mountain, NV normally run highest?
May, on the long-term record. The median daily flow that month is about 14.9 cfs, against 1.5 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 S Twin River near Round Mountain, NV?
It depends on the month. In January, half of days historically fall near 2 cfs, with the middle 80% of days between 1.1 and 3.5 cfs. The month-by-month table on this page gives the full range.
How long has S Twin River near Round Mountain, NV been measured?
Discharge records at USGS site 10249300 begin in 1965, about 61 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is S Twin River near Round Mountain, NV?
The gauge sits at 38.88743, -117.24537, in Nevada, in hydrologic subbasin 16060004, at an elevation of about 6,400 feet, draining roughly 20 square miles.
Can I use S Twin River near Round Mountain, 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.

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