Trip Planning for Northern Gallatin

as of 5:00 am
Apr 309″ | NA
Apr 29 1″ | NA
Apr 28 1″ | NA
9980′     03/31 at 16:00
42.4℉
NW - 0mph
Gusts 0mph
8100′   05/28 at 22:00
35℉
60″ Depth
Bottom Line: Spring weather can be highly variable and create a mix of avalanche problems to watch out for. Snow conditions and snow stability can change drastically from day to day or hour to hour. Anticipate rapid change and plan accordingly. Plenty of snowfall over the winter with more spring snow to come makes avalanches possible into summer.

Past 5 Days

Mon Apr 18

None
Fri Apr 22

None
Mon Apr 25

None
Fri Apr 29

None
Mon May 2

None

Relevant Avalanche Activity

Bridger Range
Bridger Bowl
Many natural storm snow slab avalanches at Bridger
Incident details include images
Bridger Bowl
SS-N-R2-D1.5-S
Elevation: 7,500
Coordinates: 45.8156, -110.9230
Caught: 0 ; Buried: 0

There were many similar depth, 8-12" natural crowns along the ridge that broke this morning or overnight within the recent snow that fell over the weekend.


More Avalanche Details

Relevant Photos

Displaying 1 - 40
  • From 5/21/22: "other older slides were visible on a wind loaded NW oriented slopes at the bottom of the basin. Still feels like winter out there with lots of light snow up high!"  Photo: C. Chupik

  • From 5/21/22: "Triggered a small slide underneath the cornice of the southeast chute off of Emigrant peak. The slide was 50 ft wide,  4 inches deep, and ran for about 100 ft. The slide was not large enough to knock you off your feet (D1). The latest storm had deposited about 12 inches of new snow underneath the cornice." Photo: C. Chupik

  • From 5/13/22: "saw a lot of recent slide activity on East facing slopes above 9000’ in Blackmore and adjacent basins. This one was at around 9800’ between Blackmore and Elephant Peak. Also the wind was ripping up top in the afternoon. Moving a lot of snow from W to E." Photo: JR Mooney

  • Natural avalanche that occurred at Bridger early on 5/9/22. There were many similar depth natural crowns along the ridge that broke within the recent snow that fell over the weekend.

  • Crown of a natural avalanche that occurred at Bridger on 5/9/22. There were many similar depth natural crowns along the ridge that broke within the recent snow that fell over the weekend.

  • Obs 5/9/22: "found an intact graupel layer buried by 10-14” of fresh snow. Got cracking on it (ectn 17, ct 18) but no propagation. Also saw lots old of storm slabs/wind slab crowns."

  • Natural wet loose avalanche in Beehive Basin. Occurred on Wednesday 5/4 after new snow fell on Tuesday.

  • Wet loose snow avalanches of recent 6" of snow. They likely occurred when the sun came out Wednesday morning, or at the end of the storm on Tuesday. GNFAC

  • "5/3/22 at approximately 4:00pm a storm slab avalanche occurred in beehive basin on a west aspect @9000 ft. This slab was 6-8” deep and propagated around 50’. No one was buried, however we aren’t sure if anyone was caught because we were not the party who triggered this avalanche. We did witness the party drop in but quick went out of sight." Photo: H. Bigos-Lowe

  • From obs 5/1/22: "This morning we toured south of Flathead Pass to check out the conditions. We noticed on our way up that the freezing line was ~7500 ft. The punchy and wet surface crust became quite supportive and icy at this altitude. We dug a pit at ~7900ft on a NE aspect. At this location, the overnight snow totaled only 2cm but we observed more significant wind deposition in and around the trees of about 10cm. Our shovel shear tests resulted in an easy shear at 120cm and hard shear (Q1) at 90cm. We saw no results from the ECT but, upon shearing the ECT block, we were able to pop off the block at 90cm with a surprising amount of energy (see photo). This block was quite consolidated, so much so that it remained intact as we pushed it out of the pit. With this observation, we stayed off steeper terrain today and will be looking for increased instability at this interface as temperatures warm." Photo: E. Shreier

  • From 4/30/22: "...there were several wet loose avalanches at Bridger today. Some with ~5cm of snow on top, maybe from yesterday or earlier in the week, and some new this morning. We watched a relatively slow moving natural size 2 come down Colter's area around 10:30. We also ski cut a size 1.5 from the skiers right of the Lower Nose (NE asp) around 9:45 which ran on the melt freeze crust from earlier this week. It moved slowly but I was surprised by how much mass it entrained. A couple other ski cuts just above had produced smaller size 1s. The debris stopped on top of an older debris pile which was significantly larger and had run significantly further. (You can kind of see the difference in the photo). There was also widespread roller balling and pinwheeling on all aspects and elevations. Note - sizes are D sizes..." Photo: N. de Leeuw

  • Skiers reported shooting cracks from their skis while ascending the terrain at Bridger Bowl. The group later remotely triggered an avalanche from 100'+ away that ran through the "Pearly Gates" and "Patrol Chute". 

  • On 4/18/22 near Cooke City we witnessed natural rollerballs and pinwheels by 11 am, and a couple wet loose slides below cliffs on southerly slopes around noon, and were able to easily trigger pinwheels on west-southwest aspects around 1230-1pm. Photo: GNFAC

  • A large drift on the Ramp just north of Bridger Bowl. Photo: GNFAC

  • Drifts cracked and slid on steep rollovers north of Bridger Bowl. Photo: K Hammonds

  • An avalanche on Wilson Peak that caught two skiers and injured one on 4/3/22. Photo: GNFAC

  • We pulled the Flanders weather station in Hyalite Canyon. The road will close to vehicles from April 1 to May 15. Photo: GNFAC

  • This natural wet, loose avalanche on the east face of Baldy Mtn in the Bridger Range likely released on March 27. Photo: B. Finch

  • This natural wet, loose avalanche on the east face of Baldy Mtn in the Bridger Range likely released on March 27. Photo: B. Finch

  • On 3/27/22 Big Sky ski patrol witnessed many natural wet slides in closed terrain. Photo: BSSP

  • "We also conducted avalanche mitigation on our Cabin’s Road at 4:30pm. The snowpack in this zone doesn’t get skied and is representative of the backcountry. The slope is ENE around 8,400’. Several wet slab avalanches were produced with explosives and ski cutting. The avalanches ranged from R4/D2 to R2/D1. They all hit the road and several crossed, and buried, the Cabin’s Road. Although most of this mitigation was done with explosives, it took minimal effort with skis to get snow moving. The crowns were 2-3’ deep and ran on the ground." Photo: YCSP

  • On 3/27/22 Bridger Bowl ski patrol witnessed many natural wet slides in closed terrain, and in adjacent backcountry terrain. Photo: BBSP

  • On 3/27/22 Bridger Bowl ski patrol witnessed many natural wet slides in closed terrain, and in adjacent backcountry terrain. Photo: BBSP

  • Natural wet slab avalanche on Cedar Mtn. Observed 3/26/22. Photo: J. Gerardi

  • Natural slab avalanche on the Sphinx. Observed 3/26/22. Photo: J. Gerardi

  • This avalanche occurred after a skier descended the slope on March 26. East-facing at 10,000 feet. Photo: E. Young

  • On March 26 many natural wet slides occurred in closed terrain at Bridger Bowl. Photo: BBSP

  • From obs: "Southerly aspects had significant sluffing on the crust interface" Photo: M. Zia 

  • From obs: "Observed a D1.5 natural on the N side of Maid of the Mist, photo attached. Looked like the upper pocket slid, then triggered the lower slope. ~75m crown line on the lower slope, depth looked like between 20-40cm. Upper pocket, hard to tell with limited viz." Photo credit: M. Zia

  • The Big Sky Ski Patrol saw this natural avalanche on Cedar Mountain as it occurred. Photo: N. Laskowski

  • Multiple skier triggered avalanches observed on 3/14/22. Photo: Anonymous

  • Triggered from a ski cut on 3/14/22. Photo: T. Rider

  • Skiers on the East face of Mt. Blackmore triggered this slab avalanche while ski cutting the slope. The avalanche broke 50' below the skier. Photo: T. Rider

  • From email 3/12/22: "Hi there, just wanted to send you guys a neat pic of the climb, Code Red in Flanders from today 3/12. There was ice debris several hundred meters downslope from the pillar, which broke off at some point..." Photo: C. Robinson

  • From obs 3/12/22: "Upon descending a ~35 degree slope, I (the snowboarder) kicked loose a wind slab that propagated 100 feet wide, 8 inch deep (max, 4 inches at edges) wind slab that traveled approximately 300 feet (entire slope over 30 degrees) before settling in 2 debris fields, each about 30’ wide and with a maximum of 2’ depth. No one was swept by the debris/buried/injured."

  • From obs 3/12/22: "Upon descending a ~35 degree slope, I (the snowboarder) kicked loose a wind slab that propagated 100 feet wide, 8 inch deep (max, 4 inches at edges) wind slab that traveled approximately 300 feet (entire slope over 30 degrees) before settling in 2 debris fields, each about 30’ wide and with a maximum of 2’ depth. No one was swept by the debris/buried/injured."

  • From obs 3/12/22: "Upon descending a ~35 degree slope, I (the snowboarder) kicked loose a wind slab that propagated 100 feet wide, 8 inch deep (max, 4 inches at edges) wind slab that traveled approximately 300 feet (entire slope over 30 degrees) before settling in 2 debris fields, each about 30’ wide and with a maximum of 2’ depth. No one was swept by the debris/buried/injured."

  • Small, long running skier triggered wind slab avalanche on Mt. Blackmore in Hyalite Canyon (3/10/22). Photo: M. Carey

  • From obs (3/10/22) : "Today we triggered a small pocket of wind loaded snow while ascending (bootpacking) the East ridge of Blackmore. The convexity broke about 1 foot down and propagated about 10 feet wide. It ran the entire distance of the East face ~800’."

    Photo: C. Firer

Videos- Northern Gallatin

WebCams


Bozeman Pass, Looking SE

Snowpit Profiles- Northern Gallatin

 

Select a snowpit on the map to view the profile image

Weather Forecast Northern Gallatin

Extended Forecast for

14 Miles SE Gallatin Gateway MT

  • Tonight

    Tonight: A chance of rain and snow showers before midnight, then a chance of snow after 3am. Some thunder is also possible.  Mostly cloudy, with a low around 33. South wind around 6 mph.  Chance of precipitation is 50%. Total nighttime snow accumulation of less than one inch possible.

    Chance
    Rain/Snow

    Low: 33 °F

  • Sunday

    Sunday: A chance of snow before 7am, then rain and snow showers likely between 7am and 10am, then rain showers after 10am. Some thunder is also possible.  High near 41. South southeast wind 6 to 10 mph becoming west in the afternoon.  Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Rain/Snow
    Likely then
    Showers

    High: 41 °F

  • Sunday
    Night

    Sunday Night: Rain showers before 7pm, then rain and snow showers between 7pm and midnight, then snow showers after midnight. The snow could be heavy at times. Some thunder is also possible.  Low around 32. Northwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 22 mph.  Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Rain/Snow
    then Heavy
    Snow

    Low: 32 °F

  • Memorial
    Day

    Memorial Day: Snow before noon, then rain and snow showers. Some thunder is also possible.  High near 36. North wind around 11 mph, with gusts as high as 24 mph.  Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Snow then
    Rain/Snow

    High: 36 °F

  • Monday
    Night

    Monday Night: Rain and snow showers likely, becoming all snow after 9pm. Some thunder is also possible.  Cloudy, with a low around 30. North wind 7 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Rain/Snow
    Likely then
    Chance Snow

    Low: 30 °F

  • Tuesday

    Tuesday: A chance of snow before 9am, then a chance of rain and snow showers between 9am and noon, then a slight chance of rain showers after noon. Some thunder is also possible.  Mostly cloudy, with a high near 43. North northeast wind around 7 mph.  Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Chance
    Rain/Snow
    then Slight
    Chance
    T-storms

    High: 43 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 28. North northeast wind around 7 mph becoming south after midnight.

    Mostly Cloudy

    Low: 28 °F

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 49. South wind around 6 mph becoming west northwest in the afternoon.

    Mostly Sunny
    then Chance
    Showers

    High: 49 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 33.

    Mostly Cloudy

    Low: 33 °F

The Last Word

Thank you to everyone that sent in observations, read the advisories, took an avalanche class or donated money, time or gear. Our success is directly related to community support and the Forest Service. Have a safe spring and summer! See this article for some general spring travel advice.


  <<  This is the most recent forecast.