Rivermatics

2 USGS Streamgages · Colorado River system

Las Vegas Wash flows and levels

Las Vegas Wash is gauged at 2 USGS streamgages in Nevada, each tracked by Rivermatics. The mainstem runs about 47 miles (75 km) from headwaters to outlet. It drains into the Colorado River system. Drainage area at the gauges ranges from 1,518 square miles at Las Vegas Wash at Vegas Valley Dr near Las Vegas, NV up to 2,125 at Las Vegas Wash at Pabco Rd near Henderson, NV. The gauged reach falls about 140 feet, from 1,670 feet down to 1,530. Rivermatics issues a daily machine-learned 14-day flow outlook for every one of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
Las Vegas Wash at Vegas Valley Dr near Las Vegas, NV NV 1,518 1,670 38.2 36.4 14-day
Las Vegas Wash at Pabco Rd near Henderson, NV NV 2,125 1,530 280.5 272.4 14-day

Typical flow by month at Las Vegas Wash at Pabco Rd near Henderson, NV

The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 42 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 140.3 305.7 365.7
February 136.8 304.6 402.6
March 137 299.7 339.5
April 131.9 280.5 324.4
May 128.1 268.2 317.2
June 125.6 263.5 313.1
July 127.1 272.4 347.5
August 130.9 283.5 357.2
September 134.4 281.2 350
October 132.4 278.7 345.6
November 141.9 288.9 342.7
December 136.1 298.5 354.6

All values in cubic feet per second (cfs).

Common questions

When does the Las Vegas Wash run highest?
January, on the long-term record at Las Vegas Wash at Pabco Rd near Henderson, NV — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 305.7 cfs that month, against 263.5 cfs in June, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
How many gauges are on the Las Vegas Wash?
Rivermatics tracks 2 USGS streamgages on the Las Vegas Wash, across Nevada. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the Las Vegas Wash?
Yes, at 2 of the 2 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily 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 each gauge's live screen.
What river system is the Las Vegas Wash part of?
The Las Vegas Wash drains into the Colorado River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
Can I use Las Vegas Wash 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.

Other rivers in the Colorado River system

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