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, February 19, 2018
E.g., Monday, February 19, 2018
E.g., Monday, February 19, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-02-18
February 18, 2018 at 7:00

Yesterday's heavy snowfall tapered overnight but dangerous avalanche conditions remain. Thick storm slabs can be found on all aspects at all elevations. Gusty east winds are forming wind slabs several feet thick on atypical aspects. Loading is stressing deeply buried weak layers in our snowpack which may result in very large avalanches. Conservative terrain selection is advised while we let our snowpack adjust to this heavy loading event.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-18
February 18, 2018 at 7:00

Yesterday's heavy snowfall tapered overnight but dangerous avalanche conditions remain. Thick storm slabs can be found on all aspects at all elevations. Gusty east winds are forming wind slabs several feet thick on atypical aspects. Loading is stressing deeply buried weak layers in our snowpack which may result in very large avalanches. Conservative terrain selection is advised while we let our snowpack adjust to this heavy loading event.

Whitefish Range
Click here to see the full advisory for 2018-02-18
February 18, 2018 at 7:00

Yesterday's heavy snowfall tapered overnight but dangerous avalanche conditions remain. Thick storm slabs can be found on all aspects at all elevations. Gusty east winds are forming wind slabs several feet thick on atypical aspects. Loading is stressing deeply buried weak layers in our snowpack which may result in very large avalanches. Conservative terrain selection is advised while we let our snowpack adjust to this heavy loading event.

Swan Range
Click here to see the full advisory for 2018-02-17
February 17, 2018 at 7:03

An Avalanche Warning is in effect. Today, the avalanche danger starts out as CONSIDERABLE but is expected to rise to HIGH later today or tonight. Heavy snow, accompanied by southwest winds, will thicken storm slabs on a weak surface. Heavy loading may reawaken deeply buried weak layers in our snowpack resulting in very large avalanches. Expect dangerous avalanche conditions to develop as the storm intensifies.  Travel in and below avalanche terrain is not recommended.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-17
February 17, 2018 at 7:03

An Avalanche Warning is in effect. Today, the avalanche danger starts out as CONSIDERABLE but is expected to rise to HIGH later today or tonight. Heavy snow, accompanied by southwest winds, will thicken storm slabs on a weak surface. Heavy loading may reawaken deeply buried weak layers in our snowpack resulting in very large avalanches. Expect dangerous avalanche conditions to develop as the storm intensifies.  Travel in and below avalanche terrain is not recommended.

Whitefish Range
Click here to see the full advisory for 2018-02-17
February 17, 2018 at 7:03

An Avalanche Warning is in effect. Today, the avalanche danger starts out as CONSIDERABLE but is expected to rise to HIGH later today or tonight. Heavy snow, accompanied by southwest winds, will thicken storm slabs on a weak surface. Heavy loading may reawaken deeply buried weak layers in our snowpack resulting in very large avalanches. Expect dangerous avalanche conditions to develop as the storm intensifies.  Travel in and below avalanche terrain is not recommended.

Swan Range
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 7:00

An Avalanche Watch is in effect. Dangerous conditions exist due to thickening storm slabs formed on a weak surface. Expect danger to rise as a series of potent storms move into the region with abundant snowfall and increasing winds. Given the widespread distribution of reactive storm slabs it is important to choose conservative, low angle terrain to ski or ride in, and avoid lingering in run-out zones. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 7:00

An Avalanche Watch is in effect. Dangerous conditions exist due to thickening storm slabs formed on a weak surface. Expect danger to rise as a series of potent storms move into the region with abundant snowfall and increasing winds. Given the widespread distribution of reactive storm slabs it is important to choose conservative, low angle terrain to ski or ride in, and avoid lingering in run-out zones. 

Whitefish Range
Click here to see the full advisory for 2018-02-16
February 16, 2018 at 7:00

An Avalanche Watch is in effect. Dangerous conditions exist due to thickening storm slabs formed on a weak surface. Expect danger to rise as a series of potent storms move into the region with abundant snowfall and increasing winds. Given the widespread distribution of reactive storm slabs it is important to choose conservative, low angle terrain to ski or ride in, and avoid lingering in run-out zones. 

Swan Range
Click here to see the full advisory for 2018-02-15
February 15, 2018 at 7:00

Over 1 foot of snow formed sensitive storm slabs. Avalanches will be easy to trigger and can run far on a slick crust in steep terrain. They could fail naturally with wind-loading. Cracking snow or recent avalanche activity are signs to stay on low angle terrain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-15
February 15, 2018 at 7:00

Over 1 foot of snow formed sensitive storm slabs. Avalanches will be easy to trigger and can run far on a slick crust in steep terrain. They could fail naturally with wind-loading. Cracking snow or recent avalanche activity are signs to stay on low angle terrain.

Whitefish Range
Click here to see the full advisory for 2018-02-15
February 15, 2018 at 7:00

Over 1 foot of snow formed sensitive storm slabs. Avalanches will be easy to trigger and can run far on a slick crust in steep terrain. They could fail naturally with wind-loading. Cracking snow or recent avalanche activity are signs to stay on low angle terrain.

Swan Range
Click here to see the full advisory for 2018-02-14
February 14, 2018 at 6:42

The avalanche danger will begin to increase today and rise to CONSIDERABLE overnight.  Watch for shallow storm instabilities to develop, especially in wind loaded or snowfall favored areas.  Thicker, older slabs remain a stubborn but consequential problem at high elevations.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-14
February 14, 2018 at 6:42

The avalanche danger will begin to increase today and rise to CONSIDERABLE overnight.  Watch for shallow storm instabilities to develop, especially in wind loaded or snowfall favored areas.  Thicker, older slabs remain a stubborn but consequential problem at high elevations.  

Whitefish Range
Click here to see the full advisory for 2018-02-14
February 14, 2018 at 6:42

The avalanche danger will begin to increase today and rise to CONSIDERABLE overnight.  Watch for shallow storm instabilities to develop, especially in wind loaded or snowfall favored areas.  Thicker, older slabs remain a stubborn but consequential problem at high elevations.  

Swan Range
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 5:47

Recent wind drifting and deeply buried weak layers require cautious travel at higher elevations, especially on wind loaded slopes or in rocky, shallow areas.  Lower elevations have a safer snowpack.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 5:47

Recent wind drifting and deeply buried weak layers require cautious travel at higher elevations, especially on wind loaded slopes or in rocky, shallow areas.  Lower elevations have a safer snowpack.  

Whitefish Range
Click here to see the full advisory for 2018-02-13
February 13, 2018 at 5:47

Recent wind drifting and deeply buried weak layers require cautious travel at higher elevations, especially on wind loaded slopes or in rocky, shallow areas.  Lower elevations have a safer snowpack.  

Swan Range
Click here to see the full advisory for 2018-02-12
February 12, 2018 at 7:01

Yesterday's strong wind event formed stiff slabs on all aspects at upper elevations. Evaluate wind loaded terrain below ridgelines, in gulleys and below normal loading locations. Weak snow near the ground is capable of producing very large avalanches. Avoid the deep slab problem with conservative terrain selection. A surface rain crust allows for safer conditions below the recent rain line.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-02-12
February 12, 2018 at 7:01

Yesterday's strong wind event formed stiff slabs on all aspects at upper elevations. Evaluate wind loaded terrain below ridgelines, in gulleys and below normal loading locations. Weak snow near the ground is capable of producing very large avalanches. Avoid the deep slab problem with conservative terrain selection. A surface rain crust allows for safer conditions below the recent rain line.

Whitefish Range
Click here to see the full advisory for 2018-02-12
February 12, 2018 at 7:01

Yesterday's strong wind event formed stiff slabs on all aspects at upper elevations. Evaluate wind loaded terrain below ridgelines, in gulleys and below normal loading locations. Weak snow near the ground is capable of producing very large avalanches. Avoid the deep slab problem with conservative terrain selection. A surface rain crust allows for safer conditions below the recent rain line.

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 2018-02-11
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 2018-02-10
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 7:06

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 7:01

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

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