THIS SNOWPACK SUMMARY EXPIRED ON March 15, 2019 @ 8:55 am
Snowpack Summary published on March 13, 2019 @ 8:55 am
Issued by Ryan Lewthwaite -

bottom line:

Any left-over loose & dry snow has been transported to Wind Slabs in the near & above treeline zones on all aspects. Use the members of your group to identify where they see Wind Slabs have formed & come to a group consensus as to where you will avoid them on the terrain. The overall snowpack stability may improve with springlike conditions favorable in our weather forecast for the remainder of the week.

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.

Swirling winds yesterday has transported any loose dry snow to Wind Slabs. These Wind Slabs can be found near & above treeline on all aspects. A wide range of variability exists as to the sensitivity & thickness of these Slabs due to inconsistent wind direction & the fetch. Where these Slabs tapper in thickness you could find more ability to initiate fractures. Include Cornices in your hazard evaluation.

Snowpack Discussion

Surface Wind Slabs are the primary concern as transported snow finds its place on the mountains. All aspects near & above treeline could have the potential for smaller sized avalanches due to this instability. The sub-surface structure of the snowpack is firmly in place & you can find areas as deep as 400cm!

recent observations

~Around the Deadman Crk area snow was observed in banners coming off ridgelines & settling near treeline. Thick areas of deposition can be found on N-E aspects as Wind Slabs.

~Natural Cornice Fall avalanches, small in size, were running in the Leavitt Cirque. Stability has increased since the recent snowfall.

CURRENT CONDITIONS Weather observations from Sonora Pass
0600 temperature: 8 deg. F.
Max. temperature in the last 24 hours: 39 deg. F.
Average wind direction during the last 24 hours: Southwest
Average wind speed during the last 24 hours: Moderate mph
Maximum wind gust in the last 24 hours: Strong mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 105 inches
weather

A cold start to the day with temperatures around 10 degrees below normal. Winds above treeline are still gusting to near 60 mph but shall decrease throughout today. Our region will get the first real taste of spring as skies clear & temperatures warm to near average. The BWRA will be under high pressure for the rest of the week & into the next, with no chance for precipitation. Winds should be light with an occasional moderate gust above treeline. 

Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8000 ft. to 10000 ft.
  Wednesday Wednesday Night Thursday
Weather: Sunny. Freezing Level Below 7000' Clear. Freezing Level Below 7000' Sunny. Freezing Level Below 7000'
Temperatures: 25 to 33 deg. F. 9 to 14 deg. F. 32 to 40 deg. F.
Wind direction: North North Light Winds
Wind speed: 15 to 20 mph; gusts to 60 mph 15 mph; gusts to 45 mph becoming light late Light winds; gusts to 25 mph early
Expected snowfall: 0 in. 0 in. 0 in.
For above 10000 ft.
  Wednesday Wednesday Night Thursday
Weather: Sunny. Freezing Level Below 7000' Clear. Freezing Level Below 7000' Sunny. Freezing Level Below 7000'
Temperatures: 18 to 24 deg. F. 7 to 12 deg. F. 26 to 31 deg. F.
Wind direction: North North Northeast
Wind speed: 30 to 45 mph decreasing to 25 to 35 mph; gusts to 60 mph 25 to 35 mph; gusts to 50 mph decreasing to 15 to 30 mph; gusts to 40 mph late 15 to 20 mph; gusts to 30 mph
Expected snowfall: 0 in. 0 in. 0 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.