Station Name: TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,842 feet

Nearest Address:
White Wolf Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.9165884, -119.6598938

Nearby Water Temperatures

Red Flag Warning issued May 15 at 10:51AM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA

Effective: Fri May 15, 2026, 10:51 AM
Expires: Sat May 16, 2026, 8:00 PM

The National Weather Service in Sacramento has issued a Red Flag Warning for gusty winds and low humidity, which is in effect from 5 AM Saturday to 8 PM PDT Monday. The Fire Weather Watch is no longer in effect. * Winds...North winds 20 to 30 mph. Gusts 35 to 45 mph, locally up to 50 mph around the Delta and the far western Sacramento Valley. * Humidity...Daytime minimum humidities of 7 to 15%; Overnight maximum relative humidities 30 to 55%. * Highest Threat...Along and west of the Interstate 5 corridor in the Sacramento Valley. Strongest winds are expected Saturday night through Sunday. * Impacts...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Red Flag Warning issued May 15 at 11:38AM PDT until May 18 at 8:00PM PDT by NWS Hanford CA

Effective: Fri May 15, 2026, 11:38 AM
Expires: Fri May 15, 2026, 8:00 PM

The National Weather Service in Hanford has issued a Red Flag Warning, which is in effect from 5 AM Saturday to 8 PM PDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 579 West Side Hills on the Coastal Range. Fire weather zone 580 San Joaquin Valley. * WIND...GUSTING TO 35 MPH SATURDAY AND SUNDAY * HUMIDITY...20% OR LESS SATURDAY AND SUNDAY THEN 15% OR LESS MONDAY * HIGHEST THREAT...FAST-MOVING GRASS FIRES * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Lake Wind Advisory issued May 15 at 10:12AM PDT until May 17 at 11:00PM PDT by NWS Reno NV

Effective: Fri May 15, 2026, 10:12 AM
Expires: Sat May 16, 2026, 4:00 PM

* WHAT...North winds 15 to 25 mph with gusts up to 40 mph for Topaz Lake, Bridgeport Reservoir, Mono Lake, and Crowley Lake. * WHERE...Mono County. * WHEN...From 11 AM to 11 PM PDT Sunday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.