Due to the conditions, Sunday, March 29 will be the last day that we post new avalanche advisories this season. Thank you to everyone who helped suppot SAC this winter. Support from the National Forest Service and private sponsors as well as individual donors make this program financially possible. Thank you to the professional observers and to everyone else who took the time to send us information.
|Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.||Natural and human-triggered avalanches unlikely.||Small avalanches in isolated areas or extreme terrain.|
Temperatures above 7000 ft. remained in the upper 30's to low 40's last night, while lower elevation valleys got a little colder due to cold air settling into those areas. This inversion should lift as the day warms up. Expect another warm and sunny day across the forecast area with temperatures in the upper 50's above 7000 ft. and light winds. A weak system moving across the Sierra south of the region may push a few clouds up into the southern part of the forecast area this afternoon and tonight. A few of these clouds could linger into Monday, but most of the forecast area will see more clear skies and warm weather again tomorrow.
As with other areas, only small isolated patches of snow remained on the SE-S-SW-W aspects in the Mt. Judah area yesterday. Even some of the E and NE aspects below 7800 ft. have started to melt out in this area. On E aspects where snow cover remained 3-4 inches of soft corn snow had formed above a supportable melt-freeze crust by midday. Some small, isolated, and inconsequential skier triggered loose wet snow sluffs and roller balls did occur on some E aspects. The northerly aspects held a mix of wet sticky snow in sunny areas and frozen melt-freeze crusts in shady areas.
Similar to the last several days, clear skies last night should have allowed the snowpack to radiate enough heat out into space for a decent overnight refreeze even though temperatures remained above freezing last night. The well established drainage channels formed by repeated melt-freeze cycles this winter combined with last night's refreeze mean that significant wet snow instabilities remain unlikely again today. Wet snow instabilities represent even less of an issue on the SE-S-SW-W aspects where the most wet snow typically forms since almost all of these aspects have melted back to bare ground. Some minor roller balls or pinwheels may form on the E and ENE aspects today, and those minor wet snow instabilities may extend to the NE, N, and NW aspects as well in areas where cloud cover materializes. Any wet snow instabilities that do form today should remain small and not involve enough snow to bury a person, but they could knock a person off balance or push someone off course. In areas near cliffs, rocks, other exposed hazards, or terrain traps these small inconvenient issues could pose more serious problems.
|0600 temperature:||35 to 43 deg. F.|
|Max. temperature in the last 24 hours:||50 to 56 deg. F.|
|Average wind direction during the last 24 hours:||Southwest shifting to east during the day yesterday|
|Average wind speed during the last 24 hours:||10 to 15 mph|
|Maximum wind gust in the last 24 hours:||33 mph|
|New snowfall in the last 24 hours:||0 inches|
|Total snow depth:||9 to 37 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.