|Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.||Natural avalanches unlikely; human-triggered avalanches possible.||Small avalanches in specific areas; or large avalanches in isolated areas.|
Warm air pushed into the forecast area yesterday afternoon and last night. Remote sensors are reporting air temperatures this morning between 8,000' and 9,000' in the mid 30s. Snow level has risen to 7,700' to 8,500'. Air temperatures will remain warm and snow levels high today. A slight chance of light rain and snow will taper off as the day progresses. Ridgetop winds have remained strong out of the southwest to west and will continue through tonight. Strong N to NE winds are forecast for tomorrow. Building high pressure will allow for decreasing cloud cover over the next 24 hours.
Observations made yesterday on Tamarack and Incline Lake Peaks (Mount Rose area) and received from Castle Peak (Donner Summit area) revealed significant amounts of ongoing wind transport in near and above treeline areas. In wind loaded areas, skier triggered cracking up to 10 feet was created on test slopes below cornice features. In a few cases, small wind slabs 6 to 14 inches deep were released. In all cases the weak layer was an easily identifiable lower density layer of recent storm snow at the base of the surface wind slab. No signs of instability were observed in wind protected areas.
Human triggered wind slabs remain an ongoing avalanche problem. Strong winds over the past two days have kept wind transport ongoing, despite decreasing snowfall amounts. Winds slabs are expected to be more difficult to trigger today than yesterday. Heavily wind loaded slopes directly below cornice features represent the most likely place to trigger an avalanche at this time.
|0600 temperature:||32 to 37 deg. F.|
|Max. temperature in the last 24 hours:||32 to 37 deg. F.|
|Average wind direction during the last 24 hours:||West Southwest|
|Average wind speed during the last 24 hours:||39 mph|
|Maximum wind gust in the last 24 hours:||63 mph|
|New snowfall in the last 24 hours:||0 to trace inches|
|Total snow depth:||27 to 39 inches|
This avalanche advisory is provided through a partnership between the Tahoe National Forest and the Sierra Avalanche Center. This advisory covers the Central Sierra Nevada Mountains between Yuba Pass on the north and Ebbetts Pass on the south. Click here for a map of the forecast area. This advisory applies only to backcountry areas outside established ski area boundaries. This advisory describes general avalanche conditions and local variations always occur. This advisory expires 24 hours after the posted time unless otherwise noted. The information in this advisory is provided by the USDA Forest Service who is solely responsible for its content.