THIS AVALANCHE ADVISORY EXPIRED ON February 7, 2018 @ 6:50 am
Avalanche Advisory published on February 6, 2018 @ 6:50 am
Issued by Jeff Thompson - Idaho Panhandle Avalanche Center

Selkirks/Cabinets

bottom line

Since our last advisory, the Selkirks and Cabinets have seen rain and wind. The rain has saturated the lower elevation snowpack while the wind at higher elevations has transported a fresh slab of snow onto leeward slopes. The rain line in most area was around 5000 ft. Be aware of the different snow conditions at different elevations and aspects. Be cautious on wind loaded slopes near ridges. 

How to read the advisory

Selkirks/Cabinets

How to read the advisory

Since our last advisory, the Selkirks and Cabinets have seen rain and wind. The rain has saturated the lower elevation snowpack while the wind at higher elevations has transported a fresh slab of snow onto leeward slopes. The rain line in most area was around 5000 ft. Be aware of the different snow conditions at different elevations and aspects. Be cautious on wind loaded slopes near ridges. 

2. Moderate

?

Above Treeline
Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

2. Moderate

?

Near Treeline
Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

1. Low

?

Below Treeline
Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
    Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Avalanche Problem 1: Wind Slab
  • Type ?
  • Aspect/Elevation ?
  • Likelihood ?
    Certain
    Very Likely
    Likely
    Possible
    Unlikely
  • Size ?
    Historic
    Very Large
    Large
    Small

Multiple weather stations in the area reported winds over 90 mph over the past 2 days. Even though there wasn't a lot of snow available for transport,  there was enough to put a fresh wind slab on leeward slopes. We're getting into the time of the season when cornices can start to get really big. Use extra caution when traveling in terrain on windward slopes above treeline.

Avalanche Problem 2: Persistent Slab
  • Type ?
  • Aspect/Elevation ?
  • Likelihood ?
    Certain
    Very Likely
    Likely
    Possible
    Unlikely
  • Size ?
    Historic
    Very Large
    Large
    Small

We can't let our guard down on the persistent weak layer problem. Even though the buried surface hoar and Thanksgiving crust layers are not failing easily they are still there and capable of producing large avalanches if triggered.  

Weather and CURRENT CONDITIONS
Weather observations from the Region
0600 temperature: 30 deg. F.
Max. temperature in the last 24 hours: 38 deg. F.
Average wind direction during the last 24 hours: SW
Average wind speed during the last 24 hours: 10-20 mph
Maximum wind gust in the last 24 hours: 47 mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 200 cm inches
Two-Day Mountain Weather Forecast Produced in partnership with the Spokane NWS
For 2000 ft. to 4000 ft.
Tuesday Tuesday Night Wednesday
Weather: Cloudy Rain / snow Rain / snow
Temperatures: 42 deg. F. 32 deg. F. 40 deg. F.
Wind Direction: SW SW SW
Wind Speed: 3-6 4-6 6-8
Expected snowfall: 0 in. >.5'' in. >.5'' in.
For 4000 ft. to 6000 ft.
Tuesday Tuesday Night Wednesday
Weather: Snow Snow Rain / Snow
Temperatures: 33 deg. F. 30 deg. F. 36 deg. F.
Wind Direction: NW-SW W SW
Wind Speed: 10-15 17-20 17-21 G30
Expected snowfall: 0 in. >1'' in. >.5'' in.
Disclaimer

Avalanche conditions change for better or worse continually. Backcountry travelers should be prepared to assess current conditions for themselves, plan their routes of travel accordingly, and never travel alone. Backcountry travelers can reduce their exposure to avalanche hazards by utilizing timbered trails and ridge routes and by avoiding open and exposed terrain with slope angles of 30 degrees or more. Backcountry travelers should carry the necessary avalanche rescue equipment such as a shovel, avalanche probe or probe ski poles, a rescue beacon and a well-equipped first aid kit.  For a recorded version of the Avalanche Advisory call (208)765-7323.