THIS AVALANCHE ADVISORY EXPIRED ON March 14, 2018 @ 6:52 am
Avalanche Advisory published on March 13, 2018 @ 6:52 am
Issued by Melissa Hendrickson - Idaho Panhandle Avalanche Center

St. Regis Basin/Silver Valley

bottom line

Sunshine and warm temperatures will destabilize the upper portion of the snowpack throughout the day.  Avoid areas where loose wet slides have the potential for pushing you into terrain traps.  And pay attention above, cornices become weaker as the weather warms.  

How to read the advisory

St. Regis Basin/Silver Valley

How to read the advisory

Sunshine and warm temperatures will destabilize the upper portion of the snowpack throughout the day.  Avoid areas where loose wet slides have the potential for pushing you into terrain traps.  And pay attention above, cornices become weaker as the weather warms.  

2. Moderate

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

2. Moderate

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

1. Low

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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: Loose Wet
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With highs in the upper 40's at the highest elevations today, the snowpack is really going to heat up.  With temperatures that high, all aspects will be affected, but heightened wet slide potential will occur on the solar aspects.  Look for pinwheels and roller balls to indicate when the pack is becoming unstable. 

Avalanche Problem 2: Persistent Slab
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The persistent weak layer is buried down there still, over a meter deep in some places on the north aspects and between a half meter and a meter on the southern aspects. The middle of the snowpack is still harboring cool temperatures, so bonding and increased stability isn't occuring fast.  Important that you dig down in your pits to see if it is problematic in the locations you are looking at to ride.  And feel free to send in observations, such as the one here, it helps us get a picture of the spatial variability of the persistent layer

Weather and CURRENT CONDITIONS
Weather observations from the Region
0600 temperature: 27 deg. F.
Max. temperature in the last 24 hours: 42 deg. F.
Average wind direction during the last 24 hours: SE
Average wind speed during the last 24 hours: 11 mph
Maximum wind gust in the last 24 hours: 23 mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 82 inches
Two-Day Mountain Weather Forecast Produced in partnership with the Spokane NWS
For 2000 ft. to 4000 ft.
Tuesday Tuesday Night Wednesday
Weather: Sunny Chance Rain Showers
Temperatures: 56 deg. F. 36 deg. F. 42 deg. F.
Wind Direction: E NE SW
Wind Speed: 9-13 6-11 7
Expected snowfall: 0 in. 0 in. 0 in.
For 4000 ft. to 6000 ft.
Tuesday Tuesday Night Wednesday
Weather: Sunny Slight chance rain then showers Rain/Snow
Temperatures: 49 deg. F. 33 deg. F. 38 deg. F.
Wind Direction: SW SE W
Wind Speed: 9-15 10 8
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.