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 February 16 at 2:38AM PST until February 18 at 10:00PM PST by NWS Hanford CA

Effective: Mon February 16, 2026, 2:38 AM
Expires: Mon February 16, 2026, 11:00 AM

* WHAT...Heavy snow with total snow accumulations 3 to 5 feet above 6,000 feet with 5 to 7 feet over the highest elevations and 1 to 2 feet down to 4,000 feet. Winds could gust as high as 60 mph. * WHERE...A portion of central California. * WHEN...Until 10 PM PST Wednesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels will begin at 5,500 to 6,000 feet on Sunday night and lower to 4,000 feet Tuesday morning. Light snow accumulations down to 3,000 feet Tuesday night into Wednesday.

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.

Winter Storm Warning issued February 15 at 11:29AM PST until February 18 at 10:00PM PST by NWS Sacramento CA

Effective: Sun February 15, 2026, 11:29 AM
Expires: Mon February 16, 2026, 4:30 PM

* WHAT...Heavy snow expected. Accumulation amounts range from up to 1 foot 1500 to 2500 feet, 1 to 2 feet at 2500 to 3500 feet and 4 to 8 feet at higher elevations. Wind gusts of 45 to 55mph expected. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park including Interstate 80 and Highway 50, northern Shasta County including portions of Interstate 5, the Coastal Range, and foothill regions of the Sierra Nevada. * WHEN...From 10 PM this evening to 10 PM PST Wednesday. * IMPACTS...Dangerous to near impossible travel conditions with chain controls and road closures. Low visibility due to a combination of wind and heavy snow. * ADDITIONAL DETAILS...Snow levels will be around 4500-5500 feet tonight through Monday. 2500 to 3500 feet snow levels by Monday night and 1500 to 2500 feet Tuesday into Wednesday. Potential to see snow levels as low as 750 feet for areas along the Coastal Range, across Shasta County including Shasta Lake, and in the southern Cascades.

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

Avalanche Watch issued February 15 at 7:10AM PST by NWS Reno NV

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Sun February 15, 2026, 7:10 AM
Expires: Mon February 16, 2026, 7:15 AM

AVAREV The following message is transmitted at the request of the Eastern Sierra Avalanche Center. The Eastern Sierra Avalanche Center in Mammoth Lakes has issued a BACKCOUNTRY AVALANCHE WATCH for the following areas: NWS Las Vegas NV - CA-519 (Eastern Sierra in Inyo County) NWS Reno NV - CA-073 (Eastern Sierra in Mono County) * WHAT...The avalanche danger is expected to rise to HIGH by Monday afternoon (February 16) and remain elevated through mid- week. * WHERE...The eastern Sierra Nevada from Virginia Lakes to the southern end of Bishop Creek. * WHEN...In effect from Monday 7 AM PST to Tuesday 7 AM PST. * IMPACTS...Heavy snow and extreme winds will create widespread areas of unstable snow. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions are expected to develop. Avalanches may run long distances, into mature forests, valley floors, or flat terrain. Travel in avalanche terrain is not recommended. Consult http://www.esavalanche.org/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.

Winter Storm Warning issued February 15 at 12:58PM PST until February 18 at 10:00PM PST by NWS Reno NV

Effective: Sun February 15, 2026, 12:58 PM
Expires: Mon February 16, 2026, 4:00 PM

* WHAT...Heavy snow. Snow accumulations between 1 to 3 feet along and west of US-395. Accumulations of 3 to 5 feet in the highest elevations along the Sierra crest. Lesser amounts of 2 to 6 inches for the Chalfant Valley. Winds gusting up to 60 mph, with up to 70 mph for wind prone locations along US-395. Sierra ridge gusts over 100 mph. * WHERE...Mono County. * WHEN...From 10 PM this evening to 10 PM PST Wednesday. * IMPACTS...Travel could be very difficult to impossible with periods of white out conditions. Very strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...Conditions will rapidly deteriorate Monday evening with the highest snowfall rates anticipated Monday afternoon and night, the a second wave Tuesday afternoon into Wednesday morning.

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.

Winter Storm Warning issued February 16 at 6:33AM PST until February 18 at 10:00PM PST by NWS Reno NV

Effective: Mon February 16, 2026, 6:33 AM
Expires: Tue February 17, 2026, 8:15 AM

* WHAT...Heavy snow. Snow accumulations between 1 to 3 feet along and west of US-395. Accumulations of 3 to 5 feet in the highest elevations along the Sierra crest. Lesser amounts of 2 to 6 inches for the Chalfant Valley. Winds gusting up to 60 mph, with up to 70 mph for wind prone locations along US-395. Sierra ridge gusts over 100 mph. * WHERE...Mono County. * WHEN...Until 10 PM PST Wednesday. * IMPACTS...Travel could be very difficult to impossible with periods of white out conditions. Very strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...Conditions will rapidly deteriorate Monday evening with the highest snowfall rates anticipated Monday afternoon and night, the a second wave Tuesday afternoon into Wednesday morning.

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.