Ongoing areas of blowing snow yesterday combined with shifting winds today will keep the concern for unstable wind slabs ongoing. The vast majority of wind slabs will exist near treeline and above treeline on NW-N-NE-E-SE aspects. Smaller new wind slabs may form today near treeline and above treeline on S-SW-W aspects. If today's NE winds are stronger than forecast, new wind slabs will be larger and more widespread.
Look for areas of blowing snow, recent cornice formation, and wind pillows to determine specific slopes where wind slabs likely exist. Avoid travel on slopes with terrain traps below such as cliffs, creek beds, and deep gullies.
Observations made yesterday on Tamarack Peak (Mount Rose area) revealed areas of ongoing blowing snow near treeline during SW wind gusts. Signs of unstable wind slabs in that particular area were limited to minor cracking. No signs of ongoing storm slab issues were observed or reported from other areas. No new avalanche activity was reported within the past 24 hours.
|0600 temperature:||6 to 14 deg. F.|
|Max. temperature in the last 24 hours:||19 to 25 deg. F.|
|Average wind direction during the last 24 hours:||SW|
|Average wind speed during the last 24 hours:||15 mph|
|Maximum wind gust in the last 24 hours:||29 mph|
|New snowfall in the last 24 hours:||Trace to 2 inches|
|Total snow depth:||122 to 148 inches|
A mix of sun breaks and light snow showers is expected today as unstable air remains in place over the region. Air temperatures remain on the colder side with air temperatures this morning above 8,000' in the single digits and teens. Ridgetop winds are shifting to the NE this morning. Wind speeds are forecast to remain in the light to moderate speed range today and tonight. Winds are expected to shift back to the W tomorrow ahead of an approaching weak weather disturbance.
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.
For a recorded version of the Avalanche Advisory call (530) 587-3558 x258