Rivermatics

USGS Streamgage 10259540

Whitewater River near Mecca

Whitewater River near Mecca is USGS streamgage 10259540 in California, monitoring river discharge in hydrologic subbasin 18100201. It drains a watershed of about 1,495 square miles. Discharge records at this site go back to 1960. Typical flow runs near 78.4 cfs in July and 87.3 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.

View live conditions & forecast →

Gauge details

State
California
Drainage area
1,495 sq mi
Gauge elevation
-227 ft
Subbasin (HUC-8)
18100201
Coordinates
33.52476, -116.0775
USGS site number
10259540
Records begin
1960-10-01 (66 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Whitewater River near Mecca. 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
42.8 45.7 48.6
42.6 46.5 50.2
43 47.1 51.1
42.9 47.2 51.6
42.9 47.6 52.7
42.6 47.5 52.7
42.3 47.4 52.9
41.6 47 52.5
41.1 46.8 52.5
41.3 47.1 53
41.2 47.3 53.5
40.9 47.4 53.8
41.3 47.9 54.9
41.4 47.9 54.5

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 66 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 54.8 78.3 120.2
February 58 84.9 132.1
March 56.5 86.3 137
April 53.7 87.3 141.5
May 49.1 85.3 143.4
June 48.7 75.3 128.1
July 46.6 78.4 125
August 48.6 84.9 137.5
September 52.3 82.2 134
October 49.4 74.2 116.4
November 51.1 74.4 111.9
December 53.6 75.7 111.5

All values in cubic feet per second (cfs).

Common questions

When does Whitewater River near Mecca normally run highest?
April, on the long-term record. The median daily flow that month is about 87.3 cfs, against 74.2 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Whitewater River near Mecca?
It depends on the month. In January, half of days historically fall near 78.3 cfs, with the middle 80% of days between 54.8 and 120.2 cfs. The month-by-month table on this page gives the full range.
How long has Whitewater River near Mecca been measured?
Discharge records at USGS site 10259540 begin in 1960, about 66 years, covering roughly 9,074 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Whitewater River near Mecca?
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 Whitewater River near Mecca?
The gauge sits at 33.52476, -116.0775, in California, in hydrologic subbasin 18100201, at an elevation of about -227 feet, draining roughly 1,495 square miles.
Can I use Whitewater River near Mecca 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 gauges in this subbasin