USA 250 Shirt →

Sierra National Forest

Extreme Heat Warning issued August 9 at 10:02AM PDT until August 10 at 8:00PM PDT by NWS Hanford CA

10:02 AM — 8:15 PM

* WHAT...The Heat Advisory has been replaced with an Extreme Heat Warning. High temperatures of 105 to 110 degrees and multiple days of Major Heat Risk. Hottest temperatures expected today. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Afternoon high temperatures of 105 to 110 degrees will occur until Monday, with the hottest temperatures expected today. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief.

Extreme Heat Warning issued August 9 at 10:02AM PDT until August 10 at 8:00PM PDT by NWS Hanford CA

10:02 AM — 8:15 PM

* WHAT...High temperatures up to 110 degrees and Major Heat Risk today and Monday. * WHERE...Mariposa-Madera Lower Sierra. Includes Mariposa, North Fork, Oakhurst, Coarsegold, and El Portal. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures of 102 to 110 degrees will occur until Monday, with the hottest temperatures expected today and mainly for elevations around 3,000 feet and lower. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief.

Heat Advisory issued August 9 at 7:29AM PDT until August 9 at 8:00PM PDT by NWS Las Vegas NV

7:29 AM — 8:00 PM

* WHAT...Hot conditions expected with highs 80 to 90 degrees above 8000 feet and 90 to 100 degrees below 8000 feet. This will result in Moderate Heat Risk. * WHERE...In California, Eastern Sierra Slopes and White Mountains of Inyo County. In Nevada, Sheep Range and Spring Mountains-Red Rock Canyon. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

Overview

Sierra National Forest is open and accessible across most of its 1.3 million acres spanning Fresno, Madera, and Mariposa counties in the central Sierra Nevada. The forest has recently reopened the vast majority of areas affected by the 2025 Garnet Fire (over 99% of the fire area reopened on October 31, 2025), though visitors should exercise caution as significant post-fire hazards remain including unstable slopes, hazard trees, and damaged roads—particularly during inclement weather and high winds. Several specific locations remain closed: Black Rock Road/11S12 (bridge damage), Black Rock Campground, Sawmill Flats Campground, and Ross Crossing camping area. Fire restrictions were lifted on October 11, 2025. Nelder Grove of Giant Sequoias is scheduled to reopen January 1, 2026, after extensive fuels reduction treatments. The Mammoth Pool boat launch remains closed for rehabilitation work. Active forest orders include occupancy limitations for extended stays (Order 05-15-00-25-20), wilderness use restrictions, wilderness campfire restrictions in the Ansel Adams and John Muir Wildernesses, and bear-proof food storage requirements at all developed recreation sites. The forest emphasizes proper bear safety, checking weather conditions before visits, and being prepared for limited cell service in backcountry areas.

Community Posts

No posts yet. Be the first to share your experience!