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

Heat Advisory issued May 8 at 7:26PM PDT until May 12 at 8:00PM PDT by NWS Hanford CA

Effective: Fri May 8, 2026, 7:26 PM
Expires: Sat May 9, 2026, 4:00 AM

* WHAT...High temperatures up to 102 with widespread Moderate HeatRisk expected. Areas of Major HeatRisk will impact portions of the foothills where the thermal belt exists overnight and in urban areas including Fresno. * WHERE...San Joaquin Valley, Coastal Ranges, as well as Lake Isabella and the Kern River Valley. * WHEN...From 11 AM Monday to 8 PM PDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Heat Advisory issued May 9 at 3:55AM PDT until May 12 at 8:00PM PDT by NWS Hanford CA

Effective: Sat May 9, 2026, 3:55 AM
Expires: Sat May 9, 2026, 12:00 PM

* WHAT...High temperatures up to 102 with widespread Moderate HeatRisk expected. Areas of Major HeatRisk will impact portions of the foothills where the thermal belt exists overnight and in urban areas including Fresno. * WHERE...A portion of central California. * WHEN...From 11 AM Monday to 8 PM PDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.