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

Winter Storm Warning issued April 12 at 1:43PM PDT until April 12 at 11:00PM PDT by NWS Hanford CA

Effective: Sun April 12, 2026, 1:43 PM
Expires: Sun April 12, 2026, 11:00 PM

* WHAT...Heavy snow expected. Low-end storm total of 10 inches and high-end total of 30 inches expected in Madera and Mariposa Counties and Yosemite National Park at and above 7,000 ft. Winds gusting to 55 mph or higher. * WHERE...A portion of central California. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening.

Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.

Winter Storm Warning issued April 12 at 10:50AM PDT until April 12 at 11:00PM PDT by NWS Sacramento CA

Effective: Sun April 12, 2026, 10:50 AM
Expires: Sun April 12, 2026, 11:00 PM

* WHAT...Heavy snow. Additional snow accumulations 6 to 12 inches above 4500 feet, with up to 18 inches at the highest peaks. Minor snowfall accumulations up to 1 to 3 inches down to 4000 feet. Winds gusting as high as 40 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park above 4500 feet. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow levels 4000-5000 feet, locally down to around 3500 feet in heavier convective showers. Heaviest snowfall expected through this evening, with snowfall rates up to 1+ inch per hour.

Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.

Winter Storm Warning issued April 12 at 11:59AM PDT until April 12 at 11:00PM PDT by NWS Reno NV

Effective: Sun April 12, 2026, 11:59 AM
Expires: Sun April 12, 2026, 11:00 PM

* WHAT...Heavy snow. Additional snow accumulations between 1 to 6 inches below 8000 feet, 5 to 12 inches above 8000 feet, and locally up to 15 inches across higher terrain along the Sierra crest. Winds peak along the crest gusting as high as 60 mph and up to 35 to 45 mph along Highway 395. * WHERE...Mono County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Travel could be difficult during periods of snow. Gusty winds could bring down tree branches.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.