Tuolumne River

Near Hetch Hetchy USGS: 11276500 Provisional Data Last Updated: May 11, 09:00 PM Pacific Daylight Time

Current Flow

2,040 cfs
Flow Extremely High Flow Is Steady Above 75th Percentile

Water Temp

48.7 °F
Safe (< 65°F)

Expected Weather

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

Location

System Insights

  • Extreme flows. Danger: high velocity and zero clarity.

  • Water temperature is 49°F — below 50°F, the threshold associated with cold shock risk for immersion.

  • Flow has risen from within the 25th–75th percentile range to above the 75th percentile over the past 7 days (477.0 → 2,040 cfs).

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

Today's Weather

Forecast Details

Morning

At 6 AM: 66°F and Overcast, wind E at 6 mph. By 10 AM: 82°F and Clear, wind NW at 3 mph.

Afternoon/Evening

At 2 PM: 85°F and Clear, wind W at 10 mph. By 6 PM: 82°F and Clear, wind W at 7 mph.

Overnight

Dropping from 71°F at 10 PM to 69°F by 4 AM. Conditions Clear with wind E at 6 mph.

3-Day Outlook

🌘 Waning Crescent

Today, May 11

☁️

85° / 64°

Chance of Rain: 1%
🌅 5:52 AM 🌇 7:58 PM

Tuesday, May 12

☁️

87° / 68°

Chance of Rain: 3%
🌅 5:51 AM 🌇 7:59 PM

Wednesday, May 13

☁️

71° / 56°

Chance of Rain: 2%
🌅 5:50 AM 🌇 8:00 PM

7-Day Flow History

Source: USGS
Current (CFS)
Historical Median
Normal Range

7-Day Water Temperature (°F)

Source: USGS
Current (°F)
Historical Median

Nearby Gauges