THIS SNOWPACK SUMMARY EXPIRED ON February 28, 2018 @ 10:32 am
Snowpack Summary published on February 26, 2018 @ 10:32 am
Issued by Ryan Lewthwaite -

bottom line:

BWRA CLOSED to Snowmobiling. New snow from last week accumulated around 10" but was badly wind effected. Stiff wind deposits have formed at treeline as serious scalloping of wind-board areas have been observed above it. Any new snow that we received has disintegrated but more is on the way today & significant amounts forecasted towards the weekend. We will let you know more as it develops.

Avalanche Character 1: Wind Slab
Wind Slab avalanches release naturally during wind events and can be triggered for up to a week after a wind event. They form in lee and cross-loaded terrain features. Avoid them by sticking to wind sheltered or wind scoured areas.

Stiff slabs have formed since the latest new snow from last week. Crusts range from supportable to not as you travel around treeline areas on North through East aspects. Aspects on NW-W-SW are mostly devoid of any snow remnants. Snow became well transported off ridges & into isolated features at & below treeline. No new avalanches were observed as slabs were hollow but stubborn to react with the weight of a human. Steep terrain may hold more of a chance for failure in these slabs & could be dicey.

Snowpack Discussion

Wind slabs have grown stiffer since the arrival of new snow (10") last week. Firm skiing conditions exist were snow has remained but most of it was battered around into isolated Easterly features. Facets were observed below a crust at 35cm, taking moderate forces to fail. Steep terrain should be avoided as we take on new snow & storm slab potential. Avalanche activity will rise today with new accumulations. Expect tomorrow to be a wee bit more sketchy traveling in avalanche terrain.

recent observations

Small "slider" storms have dropped on us new snow but strong winds have gotten rid of any powder rewards. Look for long wind slabs reaching low on slopes. Cornices are well developed & have been seen on South aspects from swirling & northerly winds. Thin slabs are being scoured above treeline leaving behind icy crusts & unmanageable slide-for-life conditions.

CURRENT CONDITIONS Weather observations from Sonora Pass
0600 temperature: 24 deg. F.
Max. temperature in the last 24 hours: 38 deg. F.
Average wind direction during the last 24 hours:
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: 0 inches
Total snow depth: 21 inches
weather

Cloudy with snow showers today into tomorrow, possible accumulations in the alpine of 6-12". Winds will be strong out of the Southwest shifting to Northeast late tonight. Gusting winds may reach 85 mph at ridgeline this afternoon with blowing snow. Freezing levels will be low, so valley bottoms may get some new snow.

Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8000 ft. to 10000 ft.
  Monday Monday Night Tuesday
Weather: Cloudy & snowing Cloudy & snowing Cloudy with snow in the morning
Temperatures: 22 - 28 deg. F. 4 - 10 deg. F. 21 - 26 deg. F.
Wind direction: Southwest Light winds North
Wind speed: 20 to 30 mph; gusts to 45 mph 10 to 15 mph; gusts to 30 mph late 10 to 15 mph; gusts to 45 mph
Expected snowfall: 1 to 5 in. 2 to 6 in. 1 in.
For above 10000 ft.
  Monday Monday Night Tuesday
Weather: Cloudy & snowing Cloudy & snowing Cloudy with morning snow
Temperatures: 15 - 20 deg. F. 1 - 6 deg. F. 17 - 22 deg. F.
Wind direction: Southwest South to Northeast late Northeast
Wind speed: 35 to 55 mph; gusts to 85 mph 10 to 15 mph; gusts to 30 mph 20 to 30 mph; gusts to 55 mph then decreasing
Expected snowfall: 1 to 5 in. 2 to 6 in. 2 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.