Tuolumne River

At Grand Cyn Of Tuolumne Ab Hetch Hetchy USGS: 11274790 Provisional Data Last Updated: May 11, 09:44 PM Pacific Daylight Time

Current Flow

2,390 cfs
Flow Moderately High Flow Is Rising

Water Temp

54.1 °F
Safe (< 65°F)

Expected Weather

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

Location

Historical context for today's date: Above 75th Percentile — higher than usual for this time of year

System Insights

  • Powerful flows. Wading is difficult; focus on the banks.

  • Flow has risen from within the 25th–75th percentile range to above the 75th percentile over the past 7 days (1,290 → 2,390 cfs).

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

Today's Weather

Forecast Details

Morning

At 6 AM: 67°F and Partly Cloudy, wind SE at 5 mph. By 10 AM: 82°F and Clear, wind W at 1 mph.

Afternoon/Evening

At 2 PM: 86°F and Clear, wind W at 12 mph. By 6 PM: 82°F and Clear, wind NW at 9 mph.

Overnight

Dropping from 71°F at 10 PM to 68°F by 4 AM. Conditions Clear with wind NE at 9 mph.

3-Day Outlook

🌘 Waning Crescent

Today, May 11

86° / 65°

Chance of Rain: 1%
🌅 5:51 AM 🌇 7:58 PM

Tuesday, May 12

☁️

86° / 68°

Chance of Rain: 3%
🌅 5:50 AM 🌇 7:59 PM

Wednesday, May 13

☁️

72° / 56°

Chance of Rain: 2%
🌅 5:49 AM 🌇 8:00 PM

7-Day Flow History

Source: USGS
Current (CFS)
Historical Median
Normal Range (p25–p75)

7-Day Water Temperature (°F)

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

Nearby Gauges