Trip Planning for Cooke City Area

as of 5:00 am
Today12″ | 20-60 NW
Nov 27 1″ | 6-14 SW
Nov 26 0″ | 10-30 W
10,000′     11/28 at 20:00
-5.9℉
SE - 6mph
Gusts 13mph
9100′     11/28 at 21:00
-4℉
36″ Depth
Bottom Line: Dangerous avalanche conditions exist in the mountains around West Yellowstone and Cooke City and in the Gallatin and Southern Madison Ranges where 9-13” of snow fell in the last 48 hours. Strong winds gusting to 65 mph created unstable drifts at many elevations and aspects. Human-triggered avalanches breaking up to two feet deep are likely on wind-loaded slopes. Larger avalanches breaking deeper into the snowpack are possible. Careful route-finding that avoids steep, wind-loaded slopes, a snowpack assessment focused on identifying instabilities in new and wind-drifted snow and conservative decision-making are essential.
Primary Problem: Wind-Drifted Snow

Past 5 Days

Thu Nov 24

Moderate
Fri Nov 25

Moderate
Sat Nov 26

Moderate
Sun Nov 27

Moderate
Today

Considerable

Relevant Avalanche Activity

Cooke City
Henderson Mountain
Natural Avalanche Henderson Mountain
Incident details include images
Henderson Mountain
SS-N-R2-D2-U
Elevation: 10,000
Aspect: NE
Coordinates: 45.0524, -109.9450
Caught: 0 ; Buried: 0

From email: "We noted one recent slab avalanche today on a NE aspect of Mt. Henderson, around 10,000.  We were skiing nearby on Nov. 11-12 and did not notice this slide, but that may have simply missed it (that slope becomes shaded by about noon this time of year and there was lots of wind affected snow in that area.)"


More Avalanche Details
Cooke City
Henderson Mountain
Large collapses near Cooke City
Incident details include images
Henderson Mountain
AS
Elevation: 9,800
Coordinates: 45.0524, -109.9450
Caught: 0 ; Buried: 0

From email: "Skied around Mt. Henderson the last 2 days-... we experienced at least 6 large collapses while touring the last 2 days, often after 10+ people up the same skin track."


More Avalanche Details

Relevant Photos

Displaying 1 - 6
  • From obs: "Well developed surface hoar was widespread this morning near Cooke City (11/25). The strong sun burned it off on aspects that received sun, but it was preserved in shaded areas." Photo: N. Salsburg

  • Big Sky ski patrol triggered these slides with explosives on 11/22 during routine avalanche mitigation work. The avalanches were hard slabs that averaged 12" deep and broke on a weak layer above a crust on top of snow that fell in October. Photo: BSSP

  • Big Sky ski patrol triggered these slides with explosives on 11/22 during routine avalanche mitigation work. The avalanches were hard slabs that averaged 12" deep and broke on a weak layer above a crust on top of snow that fell in October. Photo: BSSP

  • From email: "Saw a recent slab avalanche today on a NE aspect of Mt. Henderson, around 10,000.  We were skiing nearby on Nov. 11-12 and did not notice this slide, but that may have simply missed it (that slope becomes shaded by about noon this time of year and there was lots of wind affected snow in that area.)" Photo: B. Fredlund

  • A 6 a.m. image of the snow that fell last night in Cooke City.

  • Evidence of wind-loading creating the conditions for avalanches in the Bridger Range. Cracking is an indicator of instability. The observer noted this was "Nothing consequential," but this shows that unstable drifts are forming. They will be more consequential where there is more snow and as the wind creates larger drifts. Photo: E Smith

Videos- Cooke City Area

WebCams


Soda Butte Lodge, looking West

Soda Butte Lodge, looking East

Snowpit Profiles- Cooke City Area

 

Select a snowpit on the map to view the profile image

Weather Forecast Cooke City Area

Extended Forecast for

2 Miles NNE Cooke City MT

  • Tonight

    Tonight: Partly cloudy, with a low around -9. Wind chill values as low as -20. Northeast wind around 6 mph becoming north northwest after midnight.

    Partly Cloudy

    Low: -9 °F

  • Tuesday

    Tuesday: A 30 percent chance of snow showers.  Partly sunny and cold, with a high near 8. Wind chill values as low as -20. West wind 6 to 13 mph.  Little or no snow accumulation expected.

    Chance Snow
    Showers

    High: 8 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of snow showers.  Mostly cloudy, with a temperature rising to around 4 by 2am. Wind chill values as low as -20. West southwest wind 9 to 11 mph.

    Slight Chance
    Snow Showers

    Low: -2 °F⇑

  • Wednesday

    Wednesday: A 30 percent chance of snow showers.  Mostly cloudy, with a high near 19. Wind chill values as low as -10. Southwest wind 11 to 15 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow
    Showers

    High: 19 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of snow showers.  Mostly cloudy, with a temperature rising to around 20 by 4am. Southwest wind 15 to 18 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow
    Showers

    Low: 15 °F⇑

  • Thursday

    Thursday: A 40 percent chance of snow.  Mostly cloudy, with a high near 26. Southwest wind around 16 mph, with gusts as high as 39 mph.  New snow accumulation of around 2 inches.

    Chance Snow

    High: 26 °F

  • Thursday
    Night

    Thursday Night: Snow.  Low around 12. Southwest wind around 16 mph.  Chance of precipitation is 80%. New snow accumulation of around 4 inches.

    Snow

    Low: 12 °F

  • Friday

    Friday: Snow, mainly before 11am.  Temperature rising to near 18 by 11am, then falling to around 8 during the remainder of the day. West southwest wind 14 to 16 mph.  Chance of precipitation is 80%.

    Snow then
    Chance Snow

    High: 18 °F⇓

  • Friday
    Night

    Friday Night: A 20 percent chance of snow before 11pm.  Mostly cloudy, with a steady temperature around 7. Southwest wind around 13 mph.

    Slight Chance
    Snow then
    Mostly Cloudy

    Low: 7 °F

The Last Word

Your field observations are hugely helpful as we build a picture of snowpack stability. Let us know if it was a beautiful day or snowy, deep powder, avalanches seen or just boring riding. Submit your observations on our new page or read them all here.

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