Western Flows

Tuolumne River Below Lagrange Dam

Near Lagrange USGS: 11289650 Provisional Data Last Updated: May 24, 09:56 PM PT

Current Flow

186.0 cfs
Steady

Water Temp

53.6 °F
Safe (< 65°F)

Expected Weather

Temp --°F
Wind -- mph
Rain Chance --%
Pressure -- hPa

Location

Basin: Upper Tuolumne County: Stanislaus Elevation: 173 ft Drainage Area: 1,538.0 mi²

System Insights

  • Did you know? One acre-foot (AF) of water is exactly what it sounds like: one acre of land covered in one foot of water, roughly 326,000 gallons.

Verify access, permits, and local conditions before entering any waterway.

Today's Weather

Forecast Details

Morning

At 6 AM: 54°F and Clear, wind NW at 6 mph. By 10 AM: 66°F and Partly Cloudy, wind NW at 9 mph.

Afternoon/Evening

At 2 PM: 81°F and Partly Cloudy, wind NW at 10 mph. By 6 PM: 82°F and Clear, wind NW at 12 mph.

Overnight

Dropping from 67°F at 10 PM to 58°F by 4 AM. Conditions Partly Cloudy with wind N at 7 mph.

3-Day Outlook

🌓 First Quarter

Today, May 24

83° / 54°

Chance of Rain: 0%
5:45 AM 8:11 PM

Monday, May 25

☁️

81° / 56°

Chance of Rain: 0%
5:44 AM 8:12 PM

Tuesday, May 26

🌧️

73° / 52°

Chance of Rain: 2%
5:44 AM 8:13 PM

7-Day Flow History

Source: USGS

The current cfs of 186 CFS is running near the historical median of 223 CFS for this date, indicating average seasonal water levels.

Current (CFS)
Historical Median

7-Day Water Temperature (°F)

Source: USGS
Current (°F)
Historical Median
68°F Threshold

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Glossary & Methodology

Cubic Feet per Second (CFS)

The standard measure for streamflow. One CFS is equal to one cubic foot of water flowing past a specific point in one second (about 7.48 gallons).

Acre-Foot (AF)

The volume of water needed to cover one acre of land to a depth of one foot. One acre-foot is exactly 325,851 gallons.

Snow Water Equivalent (SWE)

The amount of water contained within the snowpack. It can be thought of as the depth of water that would theoretically result if you melted the entire snowpack instantaneously.

Data Sources

Live metrics and historical medians are aggregated directly from the US Geological Survey (USGS), California Data Exchange Center (CDEC), and National Resources Conservation Service (NRCS). Daily flow statistics represent provisional records and are subject to agency revision.