THIS SNOWPACK SUMMARY EXPIRED ON February 16, 2018 @ 10:51 am
Snowpack Summary published on February 14, 2018 @ 10:51 am
Issued by Ryan Lewthwaite -

bottom line:

BWRA CLOSED. The additional ~5cm (2") of new snow cannot heal the wounds of our season. Travel in the BWRA is treacherous with blower powder on top of ice as the surface riding conditions. A +Normal Caution will remain for those traveling on foot. Any new snow instabilities will be restricted to isolated terrain features on North through East aspects at & above treeline. It is unlikely you will trigger a large avalanche but keep your awareness UP.

Avalanche Character 1: Normal Caution
Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features. Use normal caution when travelling in the backcountry.

Take this with a small grain.... The new ~5cm (2") we received in the past 24 hours will give us a +normal caution avalanche problem today. The strong overnight winds have broadcast & pulverized the new snow into small wind slabs on the North through East aspects. One very small R1D1, Soft Slab, avalanche was observed at treeline on an east aspect. These instabilities are small & isolated to the NE aspects & will include the new snow that may have built up to 13cm in terrain features.

Snowpack Discussion

~5cm of new snow fell in the last 24 hours & was blown around by the SW winds. The precipitation sits atop an unsupportable crust that developed within our most recent dry period. Near-surface faceting had occurred just below this crust & is the primary layer of concern. Stability tests were showing failures, which did not propagate, 15cm deep at the bottom of this crust. A small dose of rime & graupel was observed early on in the frontal passage, with no visible accumulations. Our snowpack is still very thin!

recent observations

Yesterday we noted graupel on the drive in & rimed precipitation particles at the Leavitt junction. One small SS-N-R1-D1 avalanche on an East aspect at treeline was observed

CURRENT CONDITIONS Weather observations from Sonora Pass
0600 temperature: 14 deg. F.
Max. temperature in the last 24 hours: 28 deg. F.
Average wind direction during the last 24 hours: Southwest
Average wind speed during the last 24 hours: mph
Maximum wind gust in the last 24 hours: mph
New snowfall in the last 24 hours: 1 inches
Total snow depth: 15 inches
weather

A more seasonable cold air mass has settled into the Eastern Sierra region. Around 5cm (2") of cold-smoke fell in the past 24 hours with strong winds. Patchy clouds & continued winds will be seen today & tomorrow. Any precipitation that can squeeze out of the clouds will be in trace amounts. A warming trend will continue throughout the weekend & another cold front sweeps through early next week.

Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8000 ft. to 10000 ft.
  Wednesday Wednesday Night Thursday
Weather: Sunny with increasing clouds Partly cloudy with isolated snow showers late Partly cloudy then clearing with isolated snow showers early
Temperatures: 28 - 36 deg. F. 12 - 17 deg. F. 28 - 34 deg. F.
Wind direction: Southwest Southwest Light winds
Wind speed: 10 to 15 mph; gusts to 25 mph later 10 to 15 mph; gusts to 30 mph Light winds; gusts to 35 mph later
Expected snowfall: 0 in. trace in. trace in.
For above 10000 ft.
  Wednesday Wednesday Night Thursday
Weather: Sunny with increasing clouds Partly cloudy with isolated snow showers late Partly cloudy then clearing with isolated snow showers early
Temperatures: 21 - 26 deg. F. 7 - 12 deg. F. 22 - 27 deg. F.
Wind direction: Southwest Southwest North
Wind speed: 15 to 20 mph; gusts to 30 mph 15 to 25 mph; gusts to 35 mph 15 to 25 mph; gusts 30 to 45 mph later
Expected snowfall: 0 in. trace in. trace in.
Disclaimer

This snowpack summary applies only to backcountry areas in the Bridgeport Winter Recreation Area. Click here for a map of the area. This snowpack summary describes general avalanche conditions and local variations always occur. This snowpack summary expires in 48 hours unless otherwise noted. The information in this snowpack summary is provided by the USDA Forest Service who is solely responsible for its content.