THIS AVALANCHE ADVISORY EXPIRED ON March 29, 2017 @ 5:24 pm
Avalanche Advisory published on March 28, 2017 @ 5:24 pm
Issued by Kevin Davis - Idaho Panhandle Avalanche Center

St. Regis Basin/Silver Valley

bottom line

Temperatures are on the warm side and new snow is accumulating with westerly winds.  Watch wind loading on lee aspects.  Weak layers may form as changes in density new snow.  The pack may be getting a little rotten and that increases your chances of setting off loose wet sloughs. 

How to read the advisory


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

St. Regis Basin/Silver Valley

How to read the advisory

2. Moderate

?

Above Treeline

1. Low

?

Near Treeline

1. Low

?

Below Treeline

Temperatures are on the warm side and new snow is accumulating with westerly winds.  Watch wind loading on lee aspects.  Weak layers may form as changes in density new snow.  The pack may be getting a little rotten and that increases your chances of setting off loose wet sloughs. 

  • Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
Avalanche Problem 1: Wind Slab
  • Character ?
  • Aspect/Elevation ?
  • Likelihood ?
    Certain
    Very Likely
    Likely
    Possible
    Unlikely
  • Size ?
    Historic
    Very Large
    Large
    Small

Winds will be blowing out of the SW at a good clip and this will load up easterly aspects.  Watch pillows at and below ridges as they may be deep.  The snow that falls will be heavy and it will become heavier tomorrow.  Rain is a real possibility at higher elevations for the next couple of days.  

Avalanche Problem 2: Loose Wet
  • Character ?
  • Aspect/Elevation ?
  • Likelihood ?
    Certain
    Very Likely
    Likely
    Possible
    Unlikely
  • Size ?
    Historic
    Very Large
    Large
    Small

Loose wet slides are a real possibility with the wet and warm weather.  Look for natural sloughs and avoid similar terrain.  Wet sloughs are very difficult to escape once you're entrained in the moving slide.

advisory discussion

We're close to a spring cycle with the temperatures.  We're just missing the sun part.  Until then, be cautious of new snow accumulations especially when wind loaded.  Rain is always bad for the stability.  We don't have any plaguing weak layers but rain can collect on firmer layers in the pack and lubricate the slab above.  Be on your toes.  

recent observations

Tuesday report from Miles from the top of Silver - they got 6 inches yesterday (matches with the Sunset Snotel) of heavy snow.  They had some wet point release slides. Last night was about 2 inches more of snow, but it cooled off and froze.  Today it has been above freezing up high and the new snow is wet heavy. 

CURRENT CONDITIONS Weather observations from the Region
0600 temperature: 31 deg. F.
Max. temperature in the last 24 hours: 36 deg. F.
Average wind direction during the last 24 hours: WSW
Average wind speed during the last 24 hours: 7 mph
Maximum wind gust in the last 24 hours: 20 mph
New snowfall in the last 24 hours: 2-6 inches
Total snow depth: 59 inches
weather

Tonight there is a 70% chance of 1 inch of new snow.  Temperatures wil be in the mid 30s and winds will be SW at 13-15mph with gusts to 23.  Wednesday there is 100% chance of a trace of new snow.  Daytime temperatures will rise to 40 and winds will remain SW at 9-15 gusting to 23.  Thursday there is a 80% chance of 1-2 inches of new snow.  Temperatures in the high 30s and westerly winds at 10 mph.

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.