Station Name: MERCED R A HAPPY ISLES BRIDGE NR YOSEMITE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 4,095 feet

Nearest Address:
Happy Isle Loop Rd
Yosemite Valley, CA 95389
Mariposa County

GPS Coordinates: 37.73131496, -119.5590514

Nearby Water Temperatures

Red Flag Warning issued May 16 at 7:10PM PDT until May 18 at 8:00PM PDT by NWS Hanford CA

Effective: Sat May 16, 2026, 7:10 PM
Expires: Sun May 17, 2026, 4:00 AM

* 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.

Red Flag Warning issued May 17 at 4:00AM PDT until May 18 at 8:00PM PDT by NWS Hanford CA

Effective: Sun May 17, 2026, 4:00 AM
Expires: Sun May 17, 2026, 12:00 PM

* 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.

Red Flag Warning issued May 16 at 11:44AM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA

Effective: Sat May 16, 2026, 11:44 AM
Expires: Sun May 17, 2026, 4:00 PM

* Winds...North winds 20 to 30 mph. Gusts 35 to 45 mph, locally up to 50 mph around the Delta and the western Sacramento Valley. * Humidity...Daytime minimum humidities of 7 to 15%. Overnight maximum relative humidities of 20 to 55%. * Highest Threat...Along and west of the Interstate 5 corridor in the Sacramento Valley. Strongest winds are expected tonight 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 17 at 1:27AM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA

Effective: Sun May 17, 2026, 1:27 AM
Expires: Sun May 17, 2026, 5:00 PM

* Winds...North winds 20 to 30 mph. Gusts 35 to 45 mph, locally up to 50 mph around the Delta and the western Sacramento Valley. * Humidity...Daytime minimum humidities of 7 to 15%. Overnight maximum relative humidities of 20 to 55%. * Highest Threat...Along and west of the Interstate 5 corridor in the Sacramento Valley. Strongest winds are expected today. * 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.

Wind Advisory issued May 16 at 10:18PM PDT until May 17 at 11:00PM PDT by NWS Reno NV

Effective: Sat May 16, 2026, 10:18 PM
Expires: Sun May 17, 2026, 11:00 PM

* WHAT...North winds 25 to 35 mph with gusts up to 55 mph, mainly for wind prone locations along US-395 and Highway 6. * WHERE...Mono County. * WHEN...From 11 AM to 11 PM PDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Now is the time to secure loose outdoor items such as patio furniture, holiday decorations, and trash cans before winds increase which could blow these items away. The best thing to do is prepare ahead of time by making sure you have extra food and water on hand, flashlights with spare batteries and/or candles in the event of a power outage.