Avalanche Watch Issued for Lake Tahoe Backcountry this Week

Backcountry users around Lake Tahoe are being urged to use extreme caution as a powerful winter storm brings rapidly changing and potentially dangerous conditions to the Sierra.

The National Weather Service Reno issued an avalanche watch at 8:52 a.m. Wednesday, warning that high avalanche danger could develop Thursday and Thursday night. The watch remains in effect until 9 a.m. Thursday.

Forecasters say heavy snowfall combined with strong winds could lead to widespread avalanche activity in the mountains. Large avalanches capable of burying or seriously injuring people are possible in backcountry terrain, particularly on steep, wind-loaded slopes.

The NWS reminds outdoor recreationists that avalanches typically require three factors: steep slopes (generally over 30 degrees), an unstable snowpack, and a trigger such as new snow, wind, or a person traveling through the area. Warning signs include recent avalanches, shooting cracks in the snow, and audible “whumpfing” sounds.

Anyone heading into the backcountry should check current advisories, evaluate terrain carefully, and carry essential avalanche safety gear, including a transceiver, shovel, and probe. Officials stress that avalanche survival rates drop sharply after about 15 minutes, making preparation and partner rescue skills critical.