THIS AVALANCHE ADVISORY EXPIRED ON December 19, 2018 @ 6:26 am
Avalanche Advisory published on December 18, 2018 @ 6:26 am
Issued by Jeff Thompson - Idaho Panhandle Avalanche Center

Selkirks/Cabinets

bottom line

The snowpack looked to be healing quite a bit...until today! A strong winter storm is showing up as I type. Heavy snow and wind will dominate our weather for the next 24 hours.  The areas of most concern will be steep, wind loaded slopes as well as slopes near  exposed rock outcroppings.  My advise is "Be pacient".  I anticipate this snow being a good thing for our base but might need a couple of days to stablize. 

How to read the advisory

Selkirks/Cabinets

How to read the advisory

The snowpack looked to be healing quite a bit...until today! A strong winter storm is showing up as I type. Heavy snow and wind will dominate our weather for the next 24 hours.  The areas of most concern will be steep, wind loaded slopes as well as slopes near  exposed rock outcroppings.  My advise is "Be pacient".  I anticipate this snow being a good thing for our base but might need a couple of days to stablize. 

3. Considerable

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Above Treeline
Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.

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.
    Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.
Avalanche Problem 1: Storm Slab
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The new snow will increase the avalanche danger today. I was feeling pretty good about the what I saw in the snowpack yesterday, but adding a signifigant weight to the pack (new snow) in a quick time frame will take a couple days to heal.  It looks like the rain / snow line is at about 4,000 ft. Let's hope it stays snow up high!

Avalanche Problem 2: Wind Slab
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Wind loaded slopes haven't built to big yet this season... but I anticipate signifigant growth to wind loaded areas today and tonight.  We could see many feet of new snow on Leeward slopes. Keep runouts in mind today. Think about what's above you. I wouldn't be suprised to see natural avalanche activity in wind loaded area over the next 24-48 hours.

advisory discussion

                                                                                                            REMINDER- Tonight is our first SNOW PIT CHAT of the season!

Join us tonight at Matchwood Brewery in Sandpoint, ID from 6-8PM.  Come get a detailed account from Tom Eddy (Snow Safety Director) of the big avalanche that happened at Schweitzer Mountain last season. It sure made some of us scratch our heads but come listen to what we've learned from that incident.

Weather and CURRENT CONDITIONS
weather summary

WINTER STORM WARNING is in effect through Dec 19th, 4AM. Expect to see heavy snow fall and increasing winds in elevations above 4,000 ft.

Weather observations from the Region
0600 temperature: 33 deg. F.
Max. temperature in the last 24 hours: 36 deg. F.
Average wind direction during the last 24 hours: S-SW
Average wind speed during the last 24 hours: 16 mph
Maximum wind gust in the last 24 hours: 32 mph
New snowfall in the last 24 hours: 4 inches
Total snow depth: 167 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: Rain Rain Chance of Rain
Temperatures: 42 deg. F. 35 deg. F. 40 deg. F.
Wind Direction: S SW SW
Wind Speed: 14 9 11
Expected snowfall: 0 in. Tr in. 0 in.
For 4000 ft. to 6000 ft.
Tuesday Tuesday Night Wednesday
Weather: Snow Snow Snow
Temperatures: 34 deg. F. 21 deg. F. 30 deg. F.
Wind Direction: S SW SW
Wind Speed: 27-32 G47 26-34 G50 23-30 G41
Expected snowfall: 9-13'' in. 2-4'' in. >1'' 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.