Trip Planning for Northern Gallatin

as of 5:00 am
Today2″ | 30-60 SW
Feb 29 0″ | 37-52 SW
Feb 28 2″ | 23-36 W
9982′     03/01 at 03:00
19.8℉
SW - 14mph
Gusts 40 mph
8100′     03/01 at 07:00
25℉
53″ Depth
Primary Problem: Wind-Drifted Snow
Bottom Line: It is snowing and blowing and human triggered avalanches are likely. In places with more new snow, avalanches in that new snow will be easily triggered. Avalanches breaking in drifts are the likeliest problem you’ll encounter today and would be large enough to bury you. The weak layers that have been consistently avalanching for the last two months are also being loaded again. Keep your slope angles less than 30 degrees while we wait and see how they handle this loading event.

Past 5 Days

Mon Feb 26

Considerable
Tue Feb 27

Considerable
Wed Feb 28

Considerable
Thu Feb 29

Considerable
Today

Considerable

Relevant Avalanche Activity

Northern Gallatin
Hyalite - main fork
Whumphs and Cracking in Hyalite
Incident details include images
Hyalite - main fork
Coordinates: 45.4472, -110.9620
Caught: 0 ; Buried: 0

Skiing some dog pow across Hyalite reservoir between 7200-7800’ on a NE pitch I got lots of whumphs and shooting cracks while braking trail. This was a shallower snowpack than most other areas, it was still easy to break into basil facets with skis on.


More Avalanche Details
Northern Gallatin
Mt Blackmore
Natural Avalanche off Blackmore Trail
Incident details include images
Incident details contain video
Mt Blackmore
SS-N-R1-D2-O
Aspect: NE
Coordinates: 45.4477, -110.9890
Caught: 0 ; Buried: 0

From IG: This avalanche was from this morning (02/28). It was windy and the gully was likely wind-loaded. One video shows the debris and crown. The pin on the map (below) shows the location of the debris.


More Avalanche Details
Northern Gallatin
Portal Creek
Small Avalanche in Portal Creek
Portal Creek
Coordinates: 45.2694, -111.1400
Caught: 0 ; Buried: 0

Riders on 02/29/2024 observed a small avalanche while riding in Portal Creek. They estimated that the avalanche likely happened before a storm that began on 02/27/2024. 


More Avalanche Details

Relevant Photos

Displaying 1 - 40
  • Skiing some dog pow across Hyalite reservoir between 7200-7800’ on a NE pitch I got lots of whumphs and shooting cracks while braking trail. This was a shallower snowpack than most other areas, it was still easy to break into basil facets with skis on.

  • Skiing some dog pow across Hyalite reservoir between 7200-7800’ on a NE pitch I got lots of whumphs and shooting cracks while braking trail. This was a shallower snowpack than most other areas, it was still easy to break into basil facets with skis on.

  • From IG: This avalanche was from this morning (02/28). It was windy and the gully was likely wind-loaded. One video shows the debris and crown. The pin on the map (below) shows the location of the debris.

  • From obs: "Several small slabs pulled out above The Shimmy, left of Cleo's. Observed from across the valley while climbing the Dribbles. Did not observe them run, only saw the crowns. Unknown date of avalanches, but crowns were quite distinct from across the way." Photo: M. Zia

  • On 02/22/2024 we saw a natural avalanche in the Divide Cirque that probably happened late last week near 02/17/2024. Photo: GNFAC

  • On 02/22/2024 from the Divide Cirque we saw a natural avalanche near Overlook Mountain that probably happened late last week near 02/17/2024. Photo: GNFAC

  • Observed on 02/19/2024: From obs: "From the approach trail to Mummy II we saw two large crowns on the ridge associated with Mt. Bole. Not sure when they happened, but they looked pretty big!" Photo: M. Bjornsson

  • Observed on 02/19/2024: From obs: "From the approach trail to Mummy II we saw two large crowns on the ridge associated with Mt. Bole. Not sure when they happened, but they looked pretty big!" Photo: M. Bjornsson

  • Observed on 02/19/2024: From obs: "From the approach trail to Mummy II we saw two large crowns on the ridge associated with Mt. Bole. Not sure when they happened, but they looked pretty big!" Photo: M. Bjornsson

  • Climbers in Hyalite saw an avalanche that likely happened in the last 48 hours above Twin Falls on 02/19/2024. The trigger is unknown, 3' at the deepest point, and broke 100' wide. Photo: R. Parsons 

     

  • Climbers in Hyalite saw an avalanche that likely happened in the last 48 hours above Twin Falls on 02/19/2024. The trigger is unknown, 3' at the deepest point, and broke 100' wide. Photo: R. Parsons 

     

  • Climbers in Hyalite saw an avalanche that likely happened in the last 48 hours above Twin Falls on 02/19/2024. The trigger is unknown, 3' at the deepest point, and broke 100' wide. Photo: R. Parsons 

     

     

  • A skier on 02/18/2024 saw a large natural avalanche on the NE face south of Flanders that likely happened on 02/15/2024. Photo: Anonymous 

  • From obs 2/17/24: "Lots of natural activity up buck ridge. The one photoed looked like it popped off this morning. Most activity we saw seemed to be on northern facing aspects" Photo: M. Forbes

  • From facebook: "Rode up Portal creek today... We triggered 4 avalanches with the farthest one being 300 yards away. The one in the photo was the scariest one. We were playing below the windy pass hillclimb and the chute next to it let go. We had a sledder almost get caught in it, but thankfully everyone was ok. It's scary out there!"

  • Do you like to hike? Do you like to ski? Then the King & Queen of the Ridge is for you. Hike, ski and raise money for the Friends of the Avalanche Center in their 2nd biggest fundraiser of the year. Join the effort to promote and support avalanche safety and awareness! Fundraising prizes for top 5 individuals who raise over $500. No racing is necessary to compete for the fundraising prizes. Info to fundraise is HERE or donate here. Race participants for the [insert dates] event must register separately with Bridger Bowl here.

  • Climbers in Hyalite saw an avalanche near Solstice that happened on 01/21. This avalanche is 1' deep at the crown and with 18" of facets snow below. Photo: R. Meshew

  • Climbers in Hyalite saw an avalanche near Solstice that happened on 01/21. This avalanche is 1' deep at the crown and with 18" of facets snow below. Photo: R. Meshew

  • From obs: "The crown was just over 2ft deep at its max and 150ft+ wide. The were signs of recent wind loading as we approached the bowl prior to the slide." Photo. T. Hoefler

  • The debris of an avalanche that was triggered by skiers that was triggered 400 feet above them. The skiers were not on the path of the avalanche. Photo: T. Hoefler

  • Photo: T. Hoefler

  • Skiers triggered an avalanche on an east-facing slope at 9350ft.

    From obs: "The crown was just over 2ft deep at its max and 150ft+ wide. The were signs of recent wind loading as we approached the bowl prior to the slide. We did not observe any other avalanches while we were out." Photo: T. Hoefler

  • Skiers in the SE bowl of Flanders triggered an avalanche from the bottom of the slope. This happened on 01/20.

    From Obs: "as he turned into the bowl, a remote triggered avalanche ripped out above him. He was fast to reach a safe position in the trees by the time the avalanche finished its ride. The photo shows the 3 ski tracks, and the most left one is what remote triggered above." Photo: Anonymous 

  • From obs: "We considered skiing east into middle just before the prayer flags, but when approaching the slope to dig a pit we got a significant collapse and decided to ski a more conservative pitch further north. When continuing north on the ridge we saw a recent cornice collapse which triggered an avalanche" This avalanche was triggered by skiers breaking cornices on 01/20. Photo: M. Zenker

     

     

  • Skiers saw a recent natural avalanche on the west side of Mt. Blackmore. Photo: S. Lowe

  • From obs: "The crown of the westward slide looked to be around 4'. Like the one reported the other day, it ran almost to the skin track. Winds were high in the basin and on the ridge tops, transporting snow into moderately stiff slabs." Photo: S. Lowe

  • A natural avalanche to the lookers left of the summit of Mt. Blackmore. 

    From obs: "I noticed new debris coming out of the lookers left chute on Southeast face of Blackmore. got closer to the ridge and noticed this. happened last night or this morning. 5 feet deep 50 to 100 ft wide and ran roughly 800 feet." 

    Photo: N. English

  • Avalanche triggered on 01/19. From obs on 01/20: "Off the top on the face of Blackmore- Talked to the guy that set this slide off, it was triggered while he was skiing down yesterday (01/19) morning from the summit. Ran all the way down to almost the skin track." Photo: N. English

     

     

  • From obs: "About 50' from our pit we remotely triggered two D1 slab avalanches which broke on the roll over 150' above us. Crowns looked between 1-2' and 20-30' wide. The larger of the two ran 100' more or less." Photo: S. Lowe

  • From obs: "About 50' from our pit we remotely triggered two D1 slab avalanches which broke on the roll over 150' above us. Crowns looked between 1-2' and 20-30' wide." Photo: S. Lowe

  • From Obs:  "While skiing one of our intended slopes, one of my partners skied over a small rollover and as he arrived at the bottom of the small slope a pocket had released above him and stopped just above where he was standing. The culprit was again the recent snow on top of older faceted snow." Photo: Anonymous 

  • Wind loaded gully above Crypt Orchid in Hyalite. Photo: T Hughes

  • Seen on a ski tour on 1/08. From Obs: Notice a few natural avalanches and one skier triggered avalanche near of the top of Blackmore. Looked as though it was a ski cut that popped the slab. Photo: S. Lowe

  • From obs: "I experienced a large, audible collapse and shooting cracks in a 10ft radius around me" Photo: Anonymous 

     

     

  • Skiers on 12/21 saw 2 old avalanches while skiing in the Divide Peak Cirque. These avalanches likely happened near the end of the last storm cycle, 12/9. 

    From obs: "Saw evidence of two natural avalanches on southwest aspects (see photos). The age of these slides was hard to gauge based on our lack of recent snow."

  • Roller balls in Hyalite at 8000'. Photo: M. Zia

  • Skiers on 12/17 saw cracking while touring in Beehive Basin. Photo: E. Webb

  • From obs: "We were ice climbing on Mummy 3 and 4 yesterday and as we looked across the valley to Mount Bole, we could see evidence of avalanche activity on the NE aspect of the peak. It looked quite big in length but could tell a depth from that far away." Photo: R. Dorn

    Photo taken 12/14/23. Avalanche likely released the previous weekend, around 12/9/23. 

  • From obs: "We also saw some spectacular surface hoar- probably 1-2" tall in places with extremely sugary snow underneath" Photo: USFS Bozeman Snow Rangers

  • Got a view of the bowls behind maid of the mist and above twin falls today. Multiple natural wind slabs, up to size 2, on E and NE aspects, roughly 9500 ft. SS-N-R2D2-I.  My guess is they are roughly 48 hrs old.

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

Winter Weather Advisory until March 1, 05:00pmClick here for hazard details and duration Winter Weather Advisory
  •  Winter Weather Advisory until March 1, 05:00pm

    NOW until
    5:00pm Fri

    Winter Weather Advisory

  • Today

    Today: Snow, mainly before 9am.  High near 28. Breezy, with a southwest wind 16 to 25 mph, with gusts as high as 39 mph.  Chance of precipitation is 80%. Total daytime snow accumulation of around an inch possible.

    Breezy. Snow
    then Chance
    Snow

    High: 28 °F

  • Tonight

    Tonight: A 50 percent chance of snow, mainly after 11pm.  Mostly cloudy, with a low around 21. Breezy, with a south wind 18 to 22 mph, with gusts as high as 30 mph.  New snow accumulation of less than one inch possible.

    Chance Snow
    and Breezy

    Low: 21 °F

  • Saturday

    Saturday: Snow.  High near 29. Breezy, with a southwest wind 23 to 29 mph, with gusts as high as 41 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    Snow and
    Breezy

    High: 29 °F

  • Saturday
    Night

    Saturday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 8. Wind chill values as low as -10. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 33 mph.  Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Breezy. Snow
    Likely then
    Chance Snow

    Low: 8 °F

  • Sunday

    Sunday: Snow likely, mainly after 11am.  Partly sunny, with a high near 18. South southwest wind 14 to 16 mph, with gusts as high as 24 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Snow Likely

    High: 18 °F

  • Sunday
    Night

    Sunday Night: A 50 percent chance of snow, mainly before 11pm.  Mostly cloudy, with a low around 6. West wind 10 to 14 mph becoming south southwest in the evening. Winds could gust as high as 21 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow
    then Slight
    Chance Snow

    Low: 6 °F

  • Monday

    Monday: A 50 percent chance of snow, mainly after 11am.  Partly sunny, with a high near 18. South southwest wind around 14 mph, with gusts as high as 22 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow

    High: 18 °F

  • Monday
    Night

    Monday Night: A chance of snow.  Mostly cloudy, with a low around 10. South wind 15 to 17 mph, with gusts as high as 26 mph.

    Chance Snow

    Low: 10 °F

The Last Word

Clear weather and temperature fluctuations can make a weak layer in the top few cm of the snowpack called near-surface faceting. There are 3 dominant types which are explained in Bruce Jamieson’s new video featuring Karl Birkeland, Doug Chabot, Ed Adams, Mike Cooperstein, Ethan Greene and Mark Staples.

2 / 29 / 24  <<  
 
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