Station Name: MF SAN JOAQUIN R NR MAMMOTH LAKES CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,618 feet

Nearest Address:
A12 Devils Postpile Campground Rd
Mammoth Lakes, CA 93546
Madera County

GPS Coordinates: 37.63194444, -119.0863889

Nearby Water Temperatures

Heat Advisory issued July 31 at 5:57AM PDT until August 3 at 11:00PM PDT by NWS Hanford CA

Effective: Fri July 31, 2026, 5:57 AM
Expires: Fri July 31, 2026, 2:00 PM

* WHAT...Afternoon high temperatures up to 108 expected. Heat Risk will range from Moderate to Major. * WHERE...San Joaquin Valley and adjacent foothills. * WHEN...From noon Saturday to 11 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures up to 108 degrees will occur from Saturday into Monday. Overnight lows will range from the upper 60s in some valley locations to the lower 80s in some of the higher foothills.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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.