Mammoth Lakes, California – Backcountry travel in the Eastern High Sierra is strongly discouraged this morning as unstable snow and powerful winds create conditions ripe for large avalanches through 7 a.m. Wednesday.
According to the Eastern Sierra Avalanche Center, a Backcountry Avalanche Warning is in effect for Mono and Inyo counties, covering terrain between Bishop Pass and Virginia Lakes. Forecasters report high avalanche danger as heavy snowfall and strong winds rapidly load an already weak snowpack.
The added weight of new snow combined with wind-drifted slabs is increasing the likelihood of widespread slope failures. Avalanches may break deeper than expected and run long distances, potentially reaching mature forests, valley floors and flatter terrain below steep slopes.
Areas near Mammoth Lakes, June Lake and high-elevation backcountry routes are especially vulnerable. Even experienced recreationists face significant risk under these conditions.
Officials advise avoiding avalanche terrain entirely, including steep bowls, chutes and wind-loaded ridgelines. Check updated advisories at esavalanche.org before making any mountain plans.
Dangerous conditions are expected to persist through early Wednesday, and additional alerts may be issued if snowfall and wind continue.
