Western Flows

Cherry Creek Below Dion River Holm Ph

Near Mather USGS: 11278400 Provisional Data Last Updated: May 24, 09:56 PM PT

Current Flow

1240.0 cfs
Rising

Water Temp

49.8 °F
Safe (< 65°F)

Expected Weather

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

Location

Basin: Upper Tuolumne County: Tuolumne Elevation: 2,136 ft Drainage Area: 234.0 mi²

System Insights

  • Flow has risen more than 39% in the past 4 hours. Conditions are changing rapidly at this location.

  • Water temperature is 50°F — below 50°F, the threshold associated with cold shock risk for immersion.

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

Today's Weather

Forecast Details

Morning

At 6 AM: 60°F and Clear, wind SE at 7 mph. By 10 AM: 79°F and Clear, wind SW at 4 mph.

Afternoon/Evening

At 2 PM: 80°F and Mainly Clear, wind W at 11 mph. By 6 PM: 80°F and Clear, wind W at 7 mph.

Overnight

Dropping from 66°F at 10 PM to 60°F by 4 AM. Conditions Clear with wind S at 1 mph.

3-Day Outlook

🌓 First Quarter

Today, May 24

81° / 60°

Chance of Rain: 2%
5:43 AM 8:10 PM

Monday, May 25

☁️

77° / 58°

Chance of Rain: 1%
5:42 AM 8:11 PM

Tuesday, May 26

🌧️

62° / 47°

Chance of Rain: 7%
5:41 AM 8:12 PM

Flow Trend & 7-Day Forecast

Source: USGS

The current cfs of 1,240 CFS is running near the historical median of 1,080 CFS for this date, indicating average seasonal water levels.

Current (CFS)
7-Day Forecast
Historical Median

7-Day Water Temperature (°F)

Source: USGS
Current (°F)
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.