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., Thursday, June 21, 2018
E.g., Thursday, June 21, 2018
E.g., Thursday, June 21, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-02-11
February 11, 2018 at 7:05

Increasing west winds are transporting low-density snow forming slabs on leeward aspects. Today winds will switch to the northeast forming slabs on the other side of the compass. Evaluate wind loaded terrain below ridgelines and in gulleys. Weak snow near the bottom of the snowpack resulted in recent very large avalanches. Conservative terrain selection is the best way to manage the deep slab problem. Safer and more stable snow is at low and mid elevations.

Swan Range
Click here to see the full advisory for 2018-02-11
February 11, 2018 at 7:05

Increasing west winds are transporting low-density snow forming slabs on leeward aspects. Today winds will switch to the northeast forming slabs on the other side of the compass. Evaluate wind loaded terrain below ridgelines and in gulleys. Weak snow near the bottom of the snowpack resulted in recent very large avalanches. Conservative terrain selection is the best way to manage the deep slab problem. Safer and more stable snow is at low and mid elevations.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-11
February 11, 2018 at 7:05

Increasing west winds are transporting low-density snow forming slabs on leeward aspects. Today winds will switch to the northeast forming slabs on the other side of the compass. Evaluate wind loaded terrain below ridgelines and in gulleys. Weak snow near the bottom of the snowpack resulted in recent very large avalanches. Conservative terrain selection is the best way to manage the deep slab problem. Safer and more stable snow is at low and mid elevations.

Whitefish Range
Click here to see the full advisory for 2018-02-10
February 10, 2018 at 7:06

Continued benign weather is allowing our surface snowpack to gain strength with lingering storm slab instabilities at upper elevations a concern. Our snowpack remains complex with recent very large destructive avalanches failing on deeply buried weak layers. Conservative terrain selection at upper elevations is the best way to manage this unpredictable deep slab problem. Generally safer and more stable snow is found at low and mid elevations where a stout rain crust caps the surface.

Whitefish Range
Click here to see the full advisory for 2018-02-10
February 10, 2018 at 7:06

Continued benign weather is allowing our surface snowpack to gain strength with lingering storm slab instabilities at upper elevations a concern. Our snowpack remains complex with recent very large destructive avalanches failing on deeply buried weak layers. Conservative terrain selection at upper elevations is the best way to manage this unpredictable deep slab problem. Generally safer and more stable snow is found at low and mid elevations where a stout rain crust caps the surface.

Swan Range
Click here to see the full advisory for 2018-02-10
February 10, 2018 at 7:01

Benign weather is allowing our surface snowpack to gain strength with lingering storm slab instabilities at upper elevations a concern. Our snowpack remains complex with recent very large destructive avalanches failing on deeply buried weak layers. Conservative terrain selection at upper elevations is the best way to manage this unpredictable deep slab problem. Generally safer and more stable snow is found at low and mid elevations where a stout rain crust caps the surface.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 7:16

Continued snowfall allows for dangerous avalanche conditions to prevail as you gain elevation. Slopes with weak layers may produce very large and destructive avalanches capable of traveling to valley bottom. Use patience and conservative route-finding as our snowpack adjust to the new load. Be aware of overhead hazards when traveling up in elevation. Generally safer and more stable snow is found at lower elevations.

Swan Range
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 7:15

Continued snowfall allows for dangerous avalanche conditions to prevail as you gain elevation. Slopes with weak layers may produce very large and destructive avalanches capable of traveling to valley bottom. Use patience and conservative route-finding as our snowpack adjust to the new load. Be aware of overhead hazards when traveling up in elevation. Generally safer and more stable snow is found at lower elevations.

Whitefish Range
Click here to see the full advisory for 2018-02-09
February 9, 2018 at 7:07

Continued snowfall allows for dangerous avalanche conditions to prevail as you gain elevation. Slopes with weak layers may produce very large and destructive avalanches capable of traveling to valley bottom. Use patience and conservative route-finding as our snowpack adjust to the new load. Be aware of overhead hazards when traveling up in elevation. Generally safer and more stable snow is found at lower elevations.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-08
February 8, 2018 at 7:44

An Avalanche Warning is in effect for the Flathead Range and GNP and the danger is HIGH in all 3 ranges. A potent storm system funneling copious amounts of heavy snow, rain, and winds is stressing numerous weak layers that produced large avalanches earlier this week. Natural avalanches are likely and human-triggered avalanches very likely today. Some slopes have the potential to produce very destructive avalanches that could reach valley bottoms. Travel in and below avalanche terrain is not recommended.

Swan Range
Click here to see the full advisory for 2018-02-08
February 8, 2018 at 7:43

An Avalanche Warning is in effect for the Flathead Range and GNP and the danger is HIGH in all 3 ranges. A potent storm system funneling copious amounts of heavy snow, rain, and winds is stressing numerous weak layers that produced large avalanches earlier this week. Natural avalanches are likely and human-triggered avalanches very likely today. Some slopes have the potential to produce very destructive avalanches that could reach valley bottoms. Travel in and below avalanche terrain is not recommended.

Whitefish Range
Click here to see the full advisory for 2018-02-08
February 8, 2018 at 7:20

An Avalanche Warning is in effect for the Flathead Range and GNP and the danger is HIGH in all 3 ranges. A potent storm system funneling copious amounts of heavy snow, rain, and winds is stressing numerous weak layers that produced large avalanches earlier this week. Natural avalanches are likely and human-triggered avalanches very likely today. Some slopes have the potential to produce very destructive avalanches that could reach valley bottoms. Travel in and below avalanche terrain is not recommended.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-07
February 7, 2018 at 7:22

The avalanche danger is MODERATE today but will rise to CONSIDERABLE with the arrival of a hard-hitting storm that will increase the likelihood of human-triggered and natural avalanches. Some slopes have the potential to produce very large and destructive avalanches that can reach valley bottoms.  The timing and intensity of this storm is uncertain but watch for the danger to rise later today or tonight.  Default to conservative terrain choices once snowfall rates intensify.  

Swan Range
Click here to see the full advisory for 2018-02-07
February 7, 2018 at 7:19

The avalanche danger is MODERATE today but will rise to CONSIDERABLE with the arrival of a hard-hitting storm that will increase the likelihood of human-triggered and natural avalanches. Some slopes have the potential to produce very large and destructive avalanches that can reach valley bottoms.  The timing and intensity of this storm are uncertain but watch for the danger to rise later today or tonight.  Default to conservative terrain choices once snowfall rates intensify.  

Whitefish Range
Click here to see the full advisory for 2018-02-07
February 7, 2018 at 7:19

The avalanche danger is MODERATE today but will rise to CONSIDERABLE with the arrival of a hard-hitting storm that will increase the likelihood of human-triggered and natural avalanches. Some slopes have the potential to produce very large and destructive avalanches that can reach valley bottoms.  The timing and intensity of this storm are uncertain but watch for the danger to rise later today or tonight.  Default to conservative terrain choices once snowfall rates intensify.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 7:02

The avalanche danger is trending down after a large storm that peaked on Sunday night. Lingering storm instabilities can be human triggered at mid and upper elevations. Deep slabs still lurk in alpine terrain, with the potential to run full track. Carefully evaluate the snowpack and overhead hazards before traveling in avalanche terrain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 7:02

The avalanche danger is trending down after a large storm that peaked on Sunday night. Lingering storm instabilities can be human triggered at mid and upper elevations. Deep slabs still lurk in alpine terrain, with the potential to run full track. Carefully evaluate the snowpack and overhead hazards before traveling in avalanche terrain.

Whitefish Range
Click here to see the full advisory for 2018-02-06
February 6, 2018 at 7:02

The avalanche danger is trending down after a large storm that peaked on Sunday night. Lingering storm instabilities can be human triggered at mid and upper elevations. Deep slabs still lurk in alpine terrain, with the potential to run full track. Carefully evaluate the snowpack and overhead hazards before traveling in avalanche terrain.

Swan Range
Click here to see the full advisory for 2018-02-05
February 5, 2018 at 7:01

The avalanche danger peaked overnight under intense loading, but the continued threat of human-triggered or naturally occurring avalanches, some of which could run full track, requires very cautious and conservative travel today.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-05
February 5, 2018 at 7:01

The avalanche danger peaked overnight under intense loading, but the continued threat of human-triggered or naturally occurring avalanches, some of which could run full track, requires very cautious and conservative travel today.

Whitefish Range
Click here to see the full advisory for 2018-02-05
February 5, 2018 at 7:01

The avalanche danger peaked overnight under intense loading, but the continued threat of human-triggered or naturally occurring avalanches, some of which could run full track, requires very cautious and conservative travel today.

Swan Range
Click here to see the full advisory for 2018-02-04
February 4, 2018 at 7:02

Dangerous avalanche conditions exist from continued snowfall, strong winds, and fluctuating temperatures. Storm slabs have thickened on all aspects at mid and upper elevations and may be more reactive than yesterday. Another surge of moisture this afternoon/overnight will elevate the hazard if it arrives sooner than forecast. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Practice safe travel techniques, seek out lower angle sheltered terrain and stay away from runout zones.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-04
February 4, 2018 at 6:52

Cooler temperatures, tapering precipitation, and decreasing winds have allowed the snow surface to strengthen and improve stability.  Another surge of moisture this afternoon/overnight will elevate the hazard if it arrives sooner than forecast. Recently formed storm slabs resting on low-density snow remain a concern, especially on leeward aspects. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Dangerous avalanche conditions exist in the Flathead Range and southern Glacier Park (see advisory). 

Whitefish Range
Click here to see the full advisory for 2018-02-04
February 4, 2018 at 6:52

Cooler temperatures, tapering precipitation, and decreasing winds have allowed the snow surface to strengthen and improve stability.  Another surge of moisture this afternoon/overnight will elevate the hazard if it arrives sooner than forecast. Recently formed storm slabs resting on low-density snow remain a concern, especially on leeward aspects. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Dangerous avalanche conditions exist in the Flathead Range and southern Glacier Park (see advisory). 

Swan Range
Click here to see the full advisory for 2018-02-03
February 3, 2018 at 7:03

Warm temperatures, wind, rain and dense snow created dangerous avalanche conditions.  Fresh storm slabs will be sensitive to human triggering and thicken throughout the day at mid and upper elevations. Natural and human triggered wet loose slides are a concern at low and mid elevations. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Today's a great day to seek out lower angle terrain while practicing cautious route-finding and conservative decision making.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-03
February 3, 2018 at 7:03

Warm temperatures, wind, rain and dense snow created dangerous avalanche conditions.  Fresh storm slabs will be sensitive to human triggering and thicken throughout the day at mid and upper elevations. Natural and human triggered wet loose slides are a concern at low and mid elevations. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Today's a great day to seek out lower angle terrain while practicing cautious route-finding and conservative decision making.

Whitefish Range
Click here to see the full advisory for 2018-02-03
February 3, 2018 at 7:03

Warm temperatures, wind, rain and dense snow created dangerous avalanche conditions.  Fresh storm slabs will be sensitive to human triggering and thicken throughout the day at mid and upper elevations. Natural and human triggered wet loose slides are a concern at low and mid elevations. Continued loading will stress deeply buried weak layers which may result in a very large destructive avalanche. Today's a great day to seek out lower angle terrain while practicing cautious route-finding and conservative decision making.

Swan Range
Click here to see the full advisory for 2018-02-02
February 2, 2018 at 7:19

Dangerous avalanche conditions exist at upper elevations as dense snow and moderate winds form sensitive storm slabs on lower density snow. Natural or human triggered storm slabs are most likely on slopes steeper than 35 degrees at upper elevations. Additional load is stressing buried weak layers with heightened avalanche conditions at mid and lower elevations. Large and destructive upper elevation persistent slab avalanches may fail naturally and run long distances. Cautious route-finding and conservative decision making is recommended.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-02
February 2, 2018 at 7:19

Dangerous avalanche conditions exist at upper elevations as dense snow and moderate winds form sensitive storm slabs on lower density snow. Natural or human triggered storm slabs are most likely on slopes steeper than 35 degrees at upper elevations. Additional load is stressing buried weak layers with heightened avalanche conditions at mid and lower elevations. Large and destructive upper elevation persistent slab avalanches may fail naturally and run long distances. Cautious route-finding and conservative decision making is recommended.

Whitefish Range
Click here to see the full advisory for 2018-02-02
February 2, 2018 at 7:19

Dangerous avalanche conditions exist at upper elevations as dense snow and moderate winds form sensitive storm slabs on lower density snow. Natural or human triggered storm slabs are most likely on slopes steeper than 35 degrees at upper elevations. Additional load is stressing buried weak layers with heightened avalanche conditions at mid and lower elevations. Large and destructive upper elevation persistent slab avalanches may fail naturally and run long distances. Cautious route-finding and conservative decision making is recommended.

Swan Range

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