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 Weather Advisory issued March 31 at 6:36AM PDT until April 1 at 5:00AM PDT by NWS Hanford CA

Effective: Tue March 31, 2026, 6:36 AM
Expires: Tue March 31, 2026, 3:00 PM

* WHAT...75 percent probability of 6" or more of snow. 60 percent probability of winds gusting above 55 mph. * WHERE...Upper San Joaquin River and Yosemite NP outside of the valley. * WHEN...Until 5 AM PDT Wednesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Tuesday morning and evening commutes. Expect whiteout conditions with the gusty winds. Moderate confidence that trees can fall due to snow and wind.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, watch your first few steps taken on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.

Winter Weather Advisory issued March 31 at 1:20PM PDT until April 1 at 5:00AM PDT by NWS Hanford CA

Effective: Tue March 31, 2026, 1:20 PM
Expires: Tue March 31, 2026, 10:15 PM

* WHAT...75 percent probability of 6" or more of snow. 60 percent probability of winds gusting above 55 mph. * WHERE...Upper San Joaquin River and Yosemite NP outside of the valley. * WHEN...Until 5 AM PDT Wednesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Tuesday morning and evening commutes. Expect whiteout conditions with the gusty winds. Moderate confidence that trees can fall due to snow and wind.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, watch your first few steps taken on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.

Winter Weather Advisory issued March 31 at 10:13AM PDT until April 2 at 8:00AM PDT by NWS Sacramento CA

Effective: Tue March 31, 2026, 10:13 AM
Expires: Wed April 1, 2026, 1:00 PM

* WHAT...Light to moderate snow. Total snow accumulations 5 to 12 inches near the crest, including Donner Pass. Locally higher accumulations over peaks. Winds gusting as high as 55 mph. * WHERE...West Slope Northern Sierra Nevada County above 6000 feet. * WHEN...From 5 AM Wednesday to 8 AM PDT Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Wednesday morning and evening commutes. * ADDITIONAL DETAILS...Snow levels will initially be at 6500-7000 feet, before lowering to 6000-6500 feet Wednesday evening.

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

Winter Weather Advisory issued March 31 at 2:03AM PDT until April 1 at 5:00AM PDT by NWS Reno NV

Effective: Tue March 31, 2026, 2:03 AM
Expires: Wed April 1, 2026, 3:15 AM

* WHAT...Snow. Snow accumulations of 6 to 12 inches above 8000 ft, with locally up to 14 inches. Snow accumulations of 1 to 2 inches along and west of US-395. Winds gusting as high as 60 to 70 mph along ridges. * WHERE...Mono County. * WHEN...From 5 AM early this morning to 5 AM PDT Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday morning and evening commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Strong and gusty winds are expected to intensify on Wednesday afternoon and evening.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

High Wind Watch issued March 31 at 1:42AM PDT until April 2 at 11:00AM PDT by NWS Reno NV

Effective: Tue March 31, 2026, 1:42 AM
Expires: Wed April 1, 2026, 3:00 AM

* WHAT...Southwest winds of 35 to 45 mph with gusts up to 60 mph. Wind prone canyons along US-395 may see localized gusts up to 70 to 80 mph. Ridgetops gusting over to 100 mph. * WHERE...Mono County. * WHEN...From Wednesday afternoon through Thursday morning. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles.

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.