Trip Planning for Southern Madison

as of 5:00 am
Today6″ |
Nov 30 2″ |
Nov 29 0″ | NA
9460′     03/30 at 14:00
Weather station is Offline
9000′     12/01 at 15:00
22℉
39″ Depth
Bottom Line: The mountains south of Big Sky to West Yellowstone picked up 3-6” of snow with strong wind. Wind blown snow will likely crack and potentially avalanche, especially around West Yellowstone, where Dave found a buried weak layer of feathery surface hoar crystals collapsing under his weight. Because today’s storm is impacting this weak layer, it’s a good idea to stay clear of avalanche terrain. Natural avalanches are possible on wind-drifted slopes and a skier or sledder could likely trigger a slide, potentially from afar.

Past 5 Days

Sun Nov 27

Moderate
Mon Nov 28

Considerable
Tue Nov 29

Moderate
Wed Nov 30

Moderate
Today

Considerable

Relevant Avalanche Activity

Southern Madison
Tepee Basin
Avalanche Crowns in Tepee Basin
Incident details include images
Tepee Basin
N-R2-D2
Elevation: 9,500
Aspect: E
Coordinates: 44.9041, -111.1850
Caught: 0 ; Buried: 0

A number of Avalanche Crowns on an east aspect at 9500 ft.


More Avalanche Details

Relevant Photos

Displaying 1 - 11
  • We just installed a new Beacon Checker at the Fir Ridge Trailhead which leads into Teepee Basin and Cabin Creek. Thanks Jim Norlander for installing it! Photo: J. Norlander

  • At 1:30pm on 11/23 I intentionally triggered a fresh drift of snow in a narrow avalanche path along the edge of the north bowl at Bridger. Northeast aspect at 7,600’ elevation. The crown was 6-8” deep consisting of snow that fell today, 20’ wide and ran 250’ vertical. SS-ASc-R2-D1.5-I. Photo: GNFAC

  • At 1:30pm on 11/23 I intentionally triggered a fresh drift of snow in a narrow avalanche path along the edge of the north bowl at Bridger. Northeast aspect at 7,600’ elevation. The crown was 6-8” deep consisting of snow that fell today, 20’ wide and ran 250’ vertical. SS-ASc-R2-D1.5-I. Photo: GNFAC

  • 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

  • An observer reported "A number of Avalanche Crowns on an east aspect at 9500 ft." in Tepee Basin.

  • Observer reported "A number of Avalanche Crowns on an east aspect at 9500 ft." in Tepee Basin.

  • An observer reported "A number of Avalanche Crowns on an east aspect at 9500 ft." in Tepee Basin

  • From obs: "Skied Hyalite Peak today and found a wind slab ~10cm deep. Ski cut a small cornice below the main face and broke a small slide that carried ~20’ with little energy with a ~25’ wide crown" Photo: C. Crowe

  • From obs 11/12/22: "Looks like this could be a problem when buried."

  • 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

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Weather Forecast Southern Madison

Extended Forecast for

20 Miles S Big Sky MT

Winter Storm Warning until December 2, 12:00pmClick here for hazard details and duration Winter Storm Warning
  •  Winter Storm Warning until December 2, 12:00pm

    NOW until
    12:00pm Fri

    Winter Storm Warning

  • This
    Afternoon

    This Afternoon: Snow. The snow could be heavy at times.  Widespread blowing snow. High near 23. Wind chill values as low as zero. Windy, with a south southwest wind around 30 mph, with gusts as high as 44 mph.  Chance of precipitation is 90%. Total daytime snow accumulation of 5 to 9 inches possible.

    Heavy Snow
    and Blowing
    Snow

    High: 23 °F

  • Tonight

    Tonight: Snow, mainly before 3am. The snow could be heavy at times.  Widespread blowing snow, mainly before 11pm. Low around 4. Wind chill values as low as -10. Breezy, with a south southwest wind 23 to 28 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 41 mph.  Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Heavy Snow
    and Blowing
    Snow

    Low: 4 °F

  • Friday

    Friday: A 30 percent chance of snow, mainly before 7am.  Mostly sunny, with a high near 12. Wind chill values as low as -15. West northwest wind 13 to 17 mph becoming south southwest in the afternoon. Winds could gust as high as 28 mph.  New snow accumulation of less than one inch possible.

    Chance Snow
    then Mostly
    Sunny

    High: 12 °F

  • Friday
    Night

    Friday Night: Patchy blowing snow after 11pm. Partly cloudy, with a low around 0. Wind chill values as low as -20. Breezy, with a south southwest wind 17 to 22 mph, with gusts as high as 36 mph.

    Patchy
    Blowing Snow
    and Breezy

    Low: 0 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 18. South wind around 17 mph, with gusts as high as 28 mph.

    Mostly Sunny

    High: 18 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 6. South wind 8 to 14 mph, with gusts as high as 22 mph.

    Partly Cloudy

    Low: 6 °F

  • Sunday

    Sunday: A 50 percent chance of snow.  Mostly cloudy, with a high near 23. South wind 8 to 11 mph, with gusts as high as 21 mph.  New snow accumulation of less than one inch possible.

    Chance Snow

    High: 23 °F

  • Sunday
    Night

    Sunday Night: Snow likely.  Mostly cloudy, with a low around 13. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.

    Snow Likely

    Low: 13 °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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