Trip Planning for Southern Gallatin

as of 5:00 am
Today0″ |
Dec 7 4″ |
Dec 6 0″ | NA
9460′     at
- mph
Gusts mph
9000′   12/08 at 7:00
22℉
29″ Depth
Bottom Line: New snow and very strong westerly wind has increased the chances of triggering an avalanche, especially in gullies or near ridges. Retreat as soon as you see cracks shooting out in front of you and be extra careful around smooth wind pillows. Small avalanches are indicative that more, possibly bigger ones are possible. Ice climbers triggered a slide in Hyalite on Sunday and yesterday a small avalanche was seen near Lulu Pass outside Cooke City, both involving wind-loaded slopes. These unstable conditions are widespread and you need to assess steep slopes, especially those with wind drifts.
Primary Problem: Wind-Drifted Snow

Past 5 Days

Fri Nov 26

None
Mon Nov 29

None
Fri Dec 3

None
Mon Dec 6

None
Today

None

Relevant Photos

Displaying 1 - 6
  • New snow was blown into thick drifts that can be triggered by skiers or riders. Cracking like this is a sign that drifts are unstable and could slide on steeper slopes. Photo: GNFAC

  • From email (12/5/21) : "Small avalanche triggered while approaching ice climb in East fork of Hyalite basin. 

    Another D1 natural avalanche was observed later in the day similar aspect/elevation

    NE @7600’
    SS-AFu-D0.5-I"

    Photo: A. Schoening

  • Skiers on Mount Blackmore observed cracking within the freshly wind-loaded snow on a southeast-facing slope just below the ridge (11/24/21). Photo: J Schack

  • From e-mail 11/7/21: "...Once in airplane bowl we saw multiple large slides that ran last night, syn-storm. Most of which came down from the East face of Sac. A few 200-300’ wide and running the length of the bowl.,,, attached is a grainy cell phone pic of the slides in Airplane Bowl." -Anonymous.

  • From email 11/4/21: "...noticed two small wet loose avalanches in the east facing bowl between Pomp and Hardscrabble Peaks." Photo: H. Darby

  • From e-mail 11/4/21: "Hiking up in the Bridger Range from Sacagawea Pass and noticed no faceting of the current snowpack. The snow near the pass and on the ridge is very wind affected as is to be expected and dropping into the bowl on the east side of the Pass the snowpack there has a distinct sun crust. Dug around a little bit at 8600 ft on a NE aspect and found a sun crust of about two inches with what felt like rounded grains below that. Even in the direct sun, the crust was taking a long time to rewarm and was pretty slippery..." Photo: H. Darby

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Snowpit Profiles- Southern Gallatin

 

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Weather Stations- Southern Gallatin

Weather Forecast Southern Gallatin

Extended Forecast for

17 Miles SE Big Sky MT

  • Today

    Today: A 50 percent chance of snow, mainly after noon.  Mostly cloudy, with a high near 33. Breezy, with a south southwest wind around 17 mph, with gusts as high as 26 mph.  Total daytime snow accumulation of less than a half inch possible.

    Breezy.
    Slight Chance
    Snow then
    Chance Snow

    High: 33 °F

  • Tonight

    Tonight: A 50 percent chance of snow, mainly before 11pm.  Mostly cloudy, with a low around 11. Wind chill values as low as -5. West wind 10 to 14 mph, with gusts as high as 21 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow
    then Slight
    Chance Snow

    Low: 11 °F

  • Thursday

    Thursday: A 30 percent chance of snow after 11am.  Mostly sunny, with a high near 19. Wind chill values as low as -5. West wind around 11 mph.

    Chance Snow

    High: 19 °F

  • Thursday
    Night

    Thursday Night: Mostly cloudy, with a low around 3. Wind chill values as low as -10. West southwest wind around 10 mph.

    Mostly Cloudy

    Low: 3 °F

  • Friday

    Friday: A 20 percent chance of snow before 11am.  Partly sunny, with a high near 16. Breezy, with a west southwest wind 11 to 17 mph, with gusts as high as 26 mph.

    Slight Chance
    Snow then
    Partly Sunny
    and Breezy

    High: 16 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 6. Breezy, with a south southwest wind 14 to 16 mph, with gusts as high as 24 mph.

    Partly Cloudy
    and Breezy

    Low: 6 °F

  • Saturday

    Saturday: Partly sunny, with a high near 21. Breezy, with a south southwest wind 17 to 21 mph, with gusts as high as 31 mph.

    Partly Sunny
    and Breezy

    High: 21 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 18. Breezy.

    Mostly Cloudy
    and Breezy

    Low: 18 °F

  • Sunday

    Sunday: A 20 percent chance of snow.  Mostly cloudy, with a high near 29. Windy.

    Slight Chance
    Snow and
    Windy

    High: 29 °F

The Last Word

Bruce Jamieson of Snowline has posted avalanche science and training videos for backcountry travelers. These are worth checking out as we wait for more snow to fall.