Multiple heat advisories were issued across portions of California, Oregon, Washington, and Nevada on June 15, 2026. Temperatures are forecast to exceed 40°C (104°F) and could reach up to 44.4°C (112°F) in Trinity County, California.
Critical fire weather conditions are forecast across a corridor from northwestern Nevada into southeastern Oregon on Monday afternoon, May 25, with sustained southwesterly winds of 32–40 km/h (20–25 mph), minimum RH of 10–15%, and recent fire activity showing fuels becoming more receptive to wildfire spread. NWS offices issued Fire Weather Watches for parts of northern Nevada, northeastern California, and the West Humboldt Basin for Monday afternoon and evening.
A shallow earthquake registered by the USGS as M5.7 hit western Nevada near Silver Springs at 01:29 UTC on April 14, 2026. The agency is reporting a depth of 5 km (3.1 miles). The quake was followed by over 25 aftershocks by 04:26 UTC, with the strongest registered as M3.6.
A historic March heat event affected the U.S. Southwest on March 19 and 20, 2026, setting a new March temperature record in Las Vegas, Nevada, and a new highest March temperature ever recorded in the United States near Martinez Lake, Arizona. Multiple daily and monthly records were also broken across parts of Nevada, California, and Arizona, while authorities in Phoenix closed some hiking trails because of heat risk.
An anomalously early-season heatwave intensified across the western United States on March 18, 2026, with Extreme Heat Warnings in effect for parts of the Desert Southwest and temperatures forecast to expand east into the Rockies and Great Plains by March 20. Highs are expected to reach 40–44°C (104–112°F) in the hottest desert regions, with numerous daily and some monthly March records likely to be broken.
A swarm of small earthquakes has been shaking the desert northeast of Tonopah, Nevada, since late February 2026, with nearly a hundred shallow events recorded by the U.S. Geological Survey through 17:00 UTC on March 4.
A Backcountry Avalanche Watch is in effect for the Greater Lake Tahoe area due to high avalanche danger associated with a rain-on-snow event. The National Weather Service Reno and the Sierra Avalanche Center warn that widespread avalanche activity is possible, including large avalanches capable of burying or injuring people. Travel in avalanche terrain is not recommended during the watch period.
Freeze warnings remain in effect across much of southern Arizona, southeastern California, and southern Nevada through the morning of Saturday, January 10, 2026. Temperatures are forecast to fall below freezing across several valleys and desert regions, including the Tucson and Phoenix metropolitan areas, the Las Vegas Valley, and the Upper Gila River and San Pedro valleys. The National Weather Service warns that these conditions could kill crops, damage sensitive vegetation, and affect exposed plumbing.
A Winter Storm Warning and a Freeze Watch is in effect for parts of California and Nevada through early Wednesday, November 19, 2025.
Multiple spin-outs were reported along the I-80 near Truckee through the night of October 16, 2025, as a Pacific storm dropped the first heavy snow of the season over the Sierra Nevada. Chain control has been implemented at the Donner Summit, along the I-80, and US 50.
