Use this page to view archived advisories. The table below shows the overall danger rating and the bottom line for the 20 most recent advisories. Click on the time and date link above each danger rating icon to view the full advisory for that day. Use the date chooser or the pager at the bottom to scroll through the older advisories.

E.g., Monday, November 25, 2024
E.g., Monday, November 25, 2024
E.g., Monday, November 25, 2024
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2019-01-02
January 2, 2019 at 7:02

Southwest winds will pick up speed today and form new drifts on leeward aspects.  Triggering a wind slab will become increasingly possible by this afternoon.  Small avalanches may step down to buried weak layers resulting in a larger, more destructive avalanche.  Carefully evaluate terrain with freshly drifted snow.

Whitefish Range
Click here to see the full advisory for 2019-01-01
January 1, 2019 at 7:00

Shifting winds have formed several generations of wind slabs on a variety of aspects. Wind exposed slopes harbor instabilities in areas of drifted snow. Recent large destructive avalanche activity on buried weak layers confirms that persistent slabs remain a concern.  Evaluate slopes affected by the wind and be suspicious of steep rocky terrain containing a variable snow depth.

Swan Range
Click here to see the full advisory for 2019-01-01
January 1, 2019 at 7:00

Shifting winds have formed several generations of wind slabs on a variety of aspects. Wind exposed slopes harbor instabilities in areas of drifted snow. Recent large destructive avalanche activity on buried weak layers confirms that persistent slabs remain a concern.  Evaluate slopes affected by the wind and be suspicious of steep rocky terrain containing a variable snow depth.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-01-01
January 1, 2019 at 7:00

Shifting winds have formed several generations of wind slabs on a variety of aspects. Wind exposed slopes harbor instabilities in areas of drifted snow. Recent large destructive avalanche activity on buried weak layers confirms that persistent slabs remain a concern.  Evaluate slopes affected by the wind and be suspicious of steep rocky terrain containing a variable snow depth.

Whitefish Range
Click here to see the full advisory for 2018-12-31
December 31, 2018 at 7:05

The storm has ended but instabilities remain in areas of windblown snow.  Changing wind directions has formed slabs on wind exposed slopes on a variety of aspects.  Evaluate slopes harboring fresh wind drifts. Cracking or collapsing are obvious signs of instability.

Swan Range
Click here to see the full advisory for 2018-12-31
December 31, 2018 at 7:05

The storm has ended but instabilities remain in areas of windblown snow.  Changing wind directions has formed slabs on wind exposed slopes on a variety of aspects.  Evaluate slopes harboring fresh wind drifts. Cracking or collapsing are obvious signs of instability.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-31
December 31, 2018 at 7:05

The storm has ended but instabilities remain in areas of windblown snow.  Changing wind directions has formed slabs on wind exposed slopes on a variety of aspects.  Evaluate slopes harboring fresh wind drifts. Cracking or collapsing are obvious signs of instability.

Whitefish Range
Click here to see the full advisory for 2018-12-30
December 30, 2018 at 7:06

Over a foot of snow and strong winds have created dangerous avalanche conditions.  Numerous natural and human-triggered avalanches failed yesterday, and these slabs continue to thicken and become more widespread.  Bring a conservative mindset to the backcountry today and allow the snowpack time to adjust.  Shooting cracks, whumphs, recent avalanches, and thick drifts are all clear signs to stay off of terrain steeper than 35 degrees.

Swan Range
Click here to see the full advisory for 2018-12-30
December 30, 2018 at 7:06

Over a foot of snow and strong winds have created dangerous avalanche conditions.  Numerous natural and human-triggered avalanches failed yesterday, and these slabs continue to thicken and become more widespread.  Bring a conservative mindset to the backcountry today and allow the snowpack time to adjust.  Shooting cracks, whumphs, recent avalanches, and thick drifts are all clear signs to stay off of terrain steeper than 35 degrees.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-30
December 30, 2018 at 7:06

Over a foot of snow and strong winds have created dangerous avalanche conditions.  Numerous natural and human-triggered avalanches failed yesterday, and these slabs continue to thicken and become more widespread.  Bring a conservative mindset to the backcountry today and allow the snowpack time to adjust.  Shooting cracks, whumphs, recent avalanches, and thick drifts are all clear signs to stay off of terrain steeper than 35 degrees.

Whitefish Range
Click here to see the full advisory for 2018-12-29
December 29, 2018 at 7:00

Its snowing and blowing and the avalanche danger will rise to CONSIDERABLE by later today.  Natural and human triggered avalanches breaking in the new and drifted snow will be the most common hazard. You are most likely to get in trouble where winds are drifting or stiffening the new snow into easily triggered slabs.  Smaller slides have potential to step down to old weak layers and initiate larger, more dangerous avalanches.

Swan Range
Click here to see the full advisory for 2018-12-29
December 29, 2018 at 7:00

Its snowing and blowing and the avalanche danger will rise to CONSIDERABLE by later today.  Natural and human triggered avalanches breaking in the new and drifted snow will be the most common hazard. You are most likely to get in trouble where winds are drifting or stiffening the new snow into easily triggered slabs.  Smaller slides have potential to step down to old weak layers and initiate larger, more dangerous avalanches.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-29
December 29, 2018 at 7:00

Its snowing and blowing and the avalanche danger will rise to CONSIDERABLE by later today.  Natural and human triggered avalanches breaking in the new and drifted snow will be the most common hazard. You are most likely to get in trouble where winds are drifting or stiffening the new snow into easily triggered slabs.  Smaller slides have potential to step down to old weak layers and initiate larger, more dangerous avalanches.

Whitefish Range
Click here to see the full advisory for 2018-12-28
December 28, 2018 at 5:19

It remains possible to trigger avalanches that break one to two feet deep. This lingering danger is primarily a concern on high-elevation slopes steeper than about 35 degrees where dense slabs of drifted snow overly old weak layers. It is an isolated danger at mid elevations. If an approaching storm brings the strong winds and heavy snow that are forecast, the avalanche danger will rise this weekend.

Swan Range
Click here to see the full advisory for 2018-12-28
December 28, 2018 at 5:19

It remains possible to trigger avalanches that break one to two feet deep. This lingering danger is primarily a concern on high-elevation slopes steeper than about 35 degrees where dense slabs of drifted snow overly old weak layers. It is an isolated danger at mid elevations. If an approaching storm brings the strong winds and heavy snow that are forecast, the avalanche danger will rise this weekend.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-28
December 28, 2018 at 5:19

It remains possible to trigger avalanches that break one to two feet deep. This lingering danger is primarily a concern on high-elevation slopes steeper than about 35 degrees where dense slabs of drifted snow overly old weak layers. It is an isolated danger at mid elevations. If an approaching storm brings the strong winds and heavy snow that are forecast, the avalanche danger will rise this weekend.

Whitefish Range
Click here to see the full advisory for 2018-12-27
December 27, 2018 at 5:46

It remains possible to trigger avalanches that break one to two feet deep. These slides are most likely on slopes steeper than about 35 degrees where snow depths are variable, thanks to drifting and scouring by recent winds. To reduce your chances of finding slopes like this, stick to slopes sheltered from the wind and sun. Whumpfing collapses are a clear sign of danger.

Swan Range
Click here to see the full advisory for 2018-12-27
December 27, 2018 at 5:46

It remains possible to trigger avalanches that break one to two feet deep. These slides are most likely on slopes steeper than about 35 degrees where snow depths are variable, thanks to drifting and scouring by recent winds. To reduce your chances of finding slopes like this, stick to slopes sheltered from the wind and sun. Whumpfing collapses are a clear sign of danger.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-27
December 27, 2018 at 5:46

It remains possible to trigger avalanches that break one to two feet deep. These slides are most likely on slopes steeper than about 35 degrees where snow depths are variable, thanks to drifting and scouring by recent winds. To reduce your chances of finding slopes like this, stick to slopes sheltered from the wind and sun. Whumpfing collapses are a clear sign of danger.

Whitefish Range
Click here to see the full advisory for 2018-12-26
December 26, 2018 at 7:02

Observers across the region have been reporting on our talkative snowpack, especially in the higher terrain near the Divide.  Wind drifted snow has been whumpfing on top of persistent weak layers.  Terrain selection is the best way to avoid triggering persistent slab avalanches.  Sheltered slopes are a safer bet than steep, leeward areas.

Swan Range
Click here to see the full advisory for 2018-12-26
December 26, 2018 at 7:02

Observers across the region have been reporting on our talkative snowpack, especially in the higher terrain near the Divide.  Wind drifted snow has been whumpfing on top of persistent weak layers.  Terrain selection is the best way to avoid triggering persistent slab avalanches.  Sheltered slopes are a safer bet than steep, leeward areas.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-26
December 26, 2018 at 7:02

Observers across the region have been reporting on our talkative snowpack, especially in the higher terrain near the Divide.  Wind drifted snow has been whumpfing on top of persistent weak layers.  Terrain selection is the best way to avoid triggering persistent slab avalanches.  Sheltered slopes are a safer bet than steep, leeward areas.

Whitefish Range
Click here to see the full advisory for 2018-12-25
December 25, 2018 at 6:48

Layers of weak snow continue to lurk under cohesive slabs.  Give yourself the gift of patience today when choosing where to ride.  Evaluate the snowpack carefully near steep leeward terrain.  Gentle, gladed slopes are the safer choice. 

Swan Range
Click here to see the full advisory for 2018-12-25
December 25, 2018 at 6:48

Layers of weak snow continue to lurk under cohesive slabs.  Give yourself the gift of patience today when choosing where to ride.  Evaluate the snowpack carefully near steep leeward terrain.  Gentle, gladed slopes are the safer choice. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-25
December 25, 2018 at 6:48

Layers of weak snow continue to lurk under cohesive slabs.  Give yourself the gift of patience today when choosing where to ride.  Evaluate the snowpack carefully near steep leeward terrain.  Gentle, gladed slopes are the safer choice. 

Whitefish Range
Click here to see the full advisory for 2018-12-24
December 24, 2018 at 7:01

Our avalanche problem remains thick slabs of snow capping deeply buried weak layers.  Terrain selection is key for avoidance. Steep leeward terrain is most suspect with wind sheltered slopes a safer bet.  Continue to evaluate snow and terrain.

Whitefish Range
Click here to see the full advisory for 2018-12-24
December 24, 2018 at 7:01

Our avalanche problem remains thick slabs of snow capping deeply buried weak layers.  Terrain selection is key for avoidance. Steep leeward terrain is most suspect with wind sheltered slopes a safer bet.  Continue to evaluate snow and terrain.

Swan Range
Click here to see the full advisory for 2018-12-24
December 24, 2018 at 6:58

Our avalanche problem remains thick slabs of snow capping deeply buried weak layers. Terrain selection is key for avoidance. Steep leeward terrain is most suspect with wind sheltered slopes a safer bet.  Continue to evaluate snow and terrain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-12-23
December 23, 2018 at 7:02

The snowpack continues to strengthen following storms early last week. However, thick slabs over buried weak layers remain a low probability/high consequence problem. Terrain selection remains key: steep leeward terrain is most suspect.  Carefully evaluate snow and terrain.

Whitefish Range
Click here to see the full advisory for 2018-12-23
December 23, 2018 at 7:02

The snowpack continues to strengthen following storms early last week. However, thick slabs over buried weak layers remain a low probability/high consequence problem. Terrain selection remains key: steep leeward terrain is most suspect.  Carefully evaluate snow and terrain.

Swan Range

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