Trip Planning for Lionhead Range

as of 5:00 am
Today2″ | 30-45 SW
Nov 29 0″ | 5-15 N
Nov 28 10″ | 10-65 W
9420′     11/30 at 13:00
8.1℉
SW - 23mph
Gusts Unknown mph
7750′     11/30 at 13:00
19℉
33″ Depth
Bottom Line: There is 1-2” of new snow and more is on the way. Wind is strong with gusts of 40-50 mph at the ridgetops, mostly from the southwest. Today, new snow and strong wind will create drifting at all elevations. These thicker slabs of snow could be triggered. Shooting cracks or collapses (whumpfs) in these drifts are signs of instability. I recommend digging down to see what is under your feet or sled. A weak layer of surface hoar or a propagating extended column test should turn you around.
Primary Problem: Wind-Drifted Snow

Past 5 Days

Sat Nov 26

Moderate
Sun Nov 27

Moderate
Mon Nov 28

Considerable
Tue Nov 29

Moderate
Today

Moderate

Relevant Photos

Displaying 1 - 7
  • A snowmobiler noted cracking of the snow surface on the south face of Reas Peak out of Island Park. The wind crust was 3-4" thick and had facets underneath which aided the propagation. Photo: Anonymous

  • 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

  • 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

  • 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

  • We completed the setup of a SNOdar snow depth sensor on Sawtelle Peak in the Centennials on Wednesday 10/19. Forecaster Ian Hoyer for scale.

    Located at 8800 feet elevation. The sensor will record total snow depth and 24 hr snowfall. Data will be displayed on our website soon at: http://www.mtavalanche.com/weather/stations/sawtelle-snow.

WebCams


Rendezvous Ski Trail, W. Yellowstone

Snowpit Profiles- Lionhead Range

 

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Weather Forecast Lionhead Range

Extended Forecast for

10 Miles WNW West Yellowstone MT

Winter Storm Warning until December 2, 05:00pmClick here for hazard details and duration Winter Storm Warning
  •  Winter Storm Warning until December 2, 05:00pm

    NOW until
    5:00pm Fri

    Winter Storm Warning

  • This
    Afternoon

    This Afternoon: Snow.  Areas of blowing snow. High near 17. Wind chill values as low as -5. Breezy, with a south southwest wind around 24 mph, with gusts as high as 34 mph.  Chance of precipitation is 90%. Total daytime snow accumulation of 3 to 5 inches possible.

    Snow and
    Areas Blowing
    Snow

    High: 17 °F

  • Tonight

    Tonight: Snow.  Widespread blowing snow, mainly after 11pm. Low around 13. Wind chill values as low as -5. Breezy, with a south southwest wind 24 to 28 mph, with gusts as high as 39 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Snow and
    Blowing Snow

    Low: 13 °F

  • Thursday

    Thursday: Snow. The snow could be heavy at times.  Widespread blowing snow. High near 20. Wind chill values as low as -5. Windy, with a south southwest wind 28 to 31 mph, with gusts as high as 46 mph.  Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    Heavy Snow
    and Blowing
    Snow

    High: 20 °F

  • Thursday
    Night

    Thursday Night: Snow. The snow could be heavy at times.  Widespread blowing snow. Low around 10. Wind chill values as low as -5. Windy, with a south southwest wind 23 to 31 mph, with gusts as high as 47 mph.  Chance of precipitation is 100%. New snow accumulation of 8 to 12 inches possible.

    Heavy Snow
    and Blowing
    Snow

    Low: 10 °F

  • Friday

    Friday: Snow likely, mainly before 11am.  Mostly cloudy, with a high near 13. West southwest wind 15 to 18 mph, with gusts as high as 28 mph.  Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    Snow Likely
    then Chance
    Snow

    High: 13 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 4. South southwest wind around 17 mph, with gusts as high as 22 mph.

    Mostly Cloudy

    Low: 4 °F

  • Saturday

    Saturday: A 20 percent chance of snow after 11am.  Mostly cloudy, with a high near 13. South southwest wind 13 to 16 mph, with gusts as high as 21 mph.

    Slight Chance
    Snow

    High: 13 °F

  • Saturday
    Night

    Saturday Night: A chance of snow, mainly after 11pm.  Mostly cloudy, with a low around 9. South southwest wind 11 to 15 mph, with gusts as high as 21 mph.

    Chance Snow

    Low: 9 °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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