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., Wednesday, June 19, 2024
E.g., Wednesday, June 19, 2024
E.g., Wednesday, June 19, 2024
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2015-03-01
March 1, 2015 at 6:51

The Hazard above 6000 feet is MODERATE on wind loaded slopes steeper than 35º and LOW on all other terrain. Generally safe conditions exist in most terrain, but a few lingering concerns remain. Recently formed wind slabs are still sensitive to human triggers in steep terrain. In some areas, surface hoar formed over the late-January crust remains reactive. It is unlikely to trigger a persistent slab avalanche, but not impossible. Continue to evaluate the snowpack for weak and reactive layers.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-28
February 28, 2015 at 6:57

The hazard above 6000 feet is MODERATE on slopes steeper than 35º and LOW on all other terrain. Recently formed wind slabs and in some areas, surface hoar formed over a crust in late-January remain reactive. Though generally safe conditions exist in most terrain, it is important to assess slopes for weak and reactive layers before skiing or riding on them.

Whitefish Range
Click here to see the full advisory for 2015-02-28
February 28, 2015 at 6:57

The hazard above 6000 feet is MODERATE on slopes steeper than 35º and LOW on all other terrain. Recently formed wind slabs and in some areas, surface hoar formed over a crust in late-January remain reactive. Though generally safe conditions exist in most terrain, it is important to assess slopes for weak and reactive layers before skiing or riding on them.

Swan Range
Click here to see the full advisory for 2015-02-28
February 28, 2015 at 6:57

The hazard above 6000 feet is MODERATE on slopes steeper than 35º and LOW on all other terrain. Recently formed wind slabs and in some areas, surface hoar formed over a crust in late-January remain reactive. Though generally safe conditions exist in most terrain, it is important to assess slopes for weak and reactive layers before skiing or riding on them.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-26
February 26, 2015 at 7:02

The hazard above 5000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. New snow the past 24 hours ranges from 1-8 inches favoring the eastern half of the advisory area. This new snow combined with moderate north to east wind likely created fresh wind slabs. The late January weak layer and crust is spotty and remains mostly dormant, but continues to be reactive in some stability tests. Evaluate snow and terrain carefully today.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-26
February 26, 2015 at 7:00

The hazard above 6000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. New snow the past 24 hours ranges from 1-8 inches favoring the eastern half of the advisory area. This new snow combined with moderate north to east wind likely created fresh wind slabs. The late January weak layer and crust is spotty and remains mostly dormant, but continues to be reactive in some stability tests. Evaluate snow and terrain carefully today.

Whitefish Range
Click here to see the full advisory for 2015-02-26
February 26, 2015 at 7:00

The hazard above 6000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. New snow the past 24 hours ranges from 1-8 inches favoring the eastern half of the advisory area. This new snow combined with moderate north to east wind likely created fresh wind slabs. The late January weak layer and crust is spotty and remains mostly dormant, but continues to be reactive in some stability tests. Evaluate snow and terrain carefully today.

Swan Range
Click here to see the full advisory for 2015-02-24
February 24, 2015 at 6:45

The hazard above 6000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. Generally safe avalanche conditions exist on many slopes. However, wind slabs exist at upper elevations near the tops of ridges. The late January crust and surface hoar/facet layer continues to show variable results of instability in stability tests. Evalute each slope carefully before committing to ski or ride on it.  

Whitefish Range
Click here to see the full advisory for 2015-02-24
February 24, 2015 at 6:45

The hazard above 6000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. Generally safe avalanche conditions exist on many slopes. However, wind slabs exist at upper elevations near the tops of ridges. The late January crust and surface hoar/facet layer continues to show variable results of instability in stability tests. Evalute each slope carefully before committing to ski or ride on it.  

Swan Range
Click here to see the full advisory for 2015-02-24
February 24, 2015 at 6:45

The hazard above 6000 feet is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. Generally safe avalanche conditions exist on many slopes. However, wind slabs exist at upper elevations near the tops of ridges. The late January crust and surface hoar/facet layer continues to show variable results of instability in stability tests. Evalute each slope carefully before committing to ski or ride on it.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-22
February 22, 2015 at 6:37

The hazard above 5000 feet is MODERATE in the Flathead and Swan Ranges today. Yesterday's gusty winds drifted recent snow and created fresh wind slabs that remain sensitive to human triggering. These slabs may range in thickness from 12-20 inches and be fairly small relative to the slope. Be especially cautious of these slabs while traveling in consequential terrrain and near terrain traps. 

Swan Range
Click here to see the full advisory for 2015-02-22
February 22, 2015 at 6:37

The hazard above 5000 feet is MODERATE in the Flathead and Swan Ranges today. Yesterday's gusty winds drifted recent snow and created fresh wind slabs that remain sensitive to human triggering. These slabs may range in thickness from 12-20 inches and be fairly small relative to the slope. Be especially cautious of these slabs while traveling in consequential terrrain and near terrain traps. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-22
February 22, 2015 at 5:59

The hazard above 6000 feet is MODERATE in the Whitefish Range today. Surface hoar formed in late-January remains intact and buried 1.5-2 feet deep in the snow pack. Human triggered avalanches are possible on this layer. Investigate the presence and reactivity of buried surface hoar before skiing or riding a slope. Additionally, gusty winds yesterday created thin, sensitive wind slabs that are thicker in upper elevations and farther north in the range. Below 6000 feet the hazard is LOW.

Whitefish Range
Click here to see the full advisory for 2015-02-21
February 21, 2015 at 7:06

The hazard above 6000 feet is CONSIDERABLE on wind loaded slopes steeper than 35 degrees and  MODERATE in other terrain above 5000 feet. 6-8 inches of new snow fell over the past 24 hrs in the Swan and Flathead Ranges. Winds shifted out of the north and loaded slopes that are usually windward. Avoid steep, windloaded terrain and assess the snow pack for near surface instabilities before committing to a slope.

Swan Range
Click here to see the full advisory for 2015-02-21
February 21, 2015 at 7:06

The hazard above 6000 feet is CONSIDERABLE on wind loaded slopes steeper than 35 degrees and  MODERATE in other terrain above 5000 feet. 6-8 inches of new snow fell over the past 24 hrs in the Swan and Flathead Ranges. Winds shifted out of the north and loaded slopes that are usually windward. Avoid steep, windloaded terrain and assess the snow pack for near surface instabilities before committing to a slope.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-21
February 21, 2015 at 7:01

Today, the hazard above 5000 feet is MODERATE in the Whitefish Range. 2-7 inches of new snow fell favoring the Swan and Flathead Ranges. See Swan and Flathead advisories. Winds slabs may exist on slopes that are usually windward. Weak snow exists in the top 1-1.5 feet of the snow pack, and in isolated areas you may find surface hoar formed in late-January. Evaluate each slope for sensitive wind slabs and near-surface instabilities before skiing or riding it.

Whitefish Range
Click here to see the full advisory for 2015-02-19
February 19, 2015 at 6:48

The hazard above 6000 feet today is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. The late January crust and surface hoar layer continues to show variable results in stability tests still making human triggered avalanches possible. Wind slabs at upper elevations near the tops of ridges also pose a concern. Evalute each slope carefully before committing to ski or ride on it.  

Swan Range
Click here to see the full advisory for 2015-02-19
February 19, 2015 at 6:48

The hazard above 6000 feet today is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. The late January crust and surface hoar layer continues to show variable results in stability tests still making human triggered avalanches possible. Wind slabs at upper elevations near the tops of ridges also pose a concern. Evalute each slope carefully before committing to ski or ride on it.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-19
February 19, 2015 at 6:48

The hazard above 6000 feet today is MODERATE on slopes steeper than 35 degrees and LOW on all other terrain. The late January crust and surface hoar layer continues to show variable results in stability tests still making human triggered avalanches possible. Wind slabs at upper elevations near the tops of ridges also pose a concern. Evalute each slope carefully before committing to ski or ride on it.  

Whitefish Range
Click here to see the full advisory for 2015-02-17
February 17, 2015 at 6:55

The hazard on wind loaded slopes steeper than 35 degrees is CONSIDERABLE in the Flathead Range. The hazard on all other slopes above 5000 ft. is MODERATE and LOW below 5000 ft. A storm brushing the Continental Divide over the past 48 hours dropped 8-12 inches on the far eastern edge of the advisory area (Marias Pass). This hazard is likely isolated to the east edge of the range. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-17
February 17, 2015 at 6:50

The hazard today is MODERATE above 6000 ft. due to a layer of weak snow about 1.5 - 2 feet from the surface as well as the potential for loose, wet snow avalanches on sunny aspects as the day progresses. The hazard below 6000 ft. is LOW. Evaluate snow and terrain carefully today by digging into the snow to identify potential weak layers. Avoid being on sunny slopes as the day warms and move to shadier slopes.

Swan Range
Click here to see the full advisory for 2015-02-17
February 17, 2015 at 6:50

The hazard today is MODERATE above 6000 ft. due to a layer of weak snow about 1.5 - 2 feet from the surface as well as the potential for loose, wet snow avalanches on sunny aspects as the day progresses. The hazard below 6000 ft. is LOW. Evaluate snow and terrain carefully today by digging into the snow to identify potential weak layers. Avoid being on sunny slopes as the day warms and move to shadier slopes.

Whitefish Range
Click here to see the full advisory for 2015-02-15
February 15, 2015 at 6:56

The avalanche hazard is MODERATE in steep terrain above 5500 feet. Human triggered avalanches are possible in isolated areas where buried surface hoar survived the recent series of warm, wet storm systems. Dig into the snow to determine if this weak layer is present, and where it is choose conservative, low angle terrain.  Below 5500 feet the hazard is LOW.

Swan Range
Click here to see the full advisory for 2015-02-15
February 15, 2015 at 6:56

The avalanche hazard is MODERATE in steep terrain above 5500 feet. Human triggered avalanches are possible in isolated areas where buried surface hoar survived the recent series of warm, wet storm systems. Dig into the snow to determine if this weak layer is present, and where it is choose conservative, low angle terrain.  Below 5500 feet the hazard is LOW.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-15
February 15, 2015 at 6:56

The avalanche hazard is MODERATE in steep terrain above 5500 feet. Human triggered avalanches are possible in isolated areas where buried surface hoar survived the recent series of warm, wet storm systems. Dig into the snow to determine if this weak layer is present, and where it is choose conservative, low angle terrain.  Below 5500 feet the hazard is LOW.

Whitefish Range
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Swan Range
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2015-02-14
February 14, 2015 at 6:58

Increased cloud cover and slightly cooler temperatures will decrease the loose, wet avalanche hazard today. However, above freezing temperatures are still expected and human triggered avalanches remain possible. The hazard is MODERATE above 5000 feet. In isolated areas, surface hoar formed in late January still exists and has proven reactive. Continue to assess the snow pack for deeper instabilities and choose conservative terrain where present and reactive.

Whitefish Range
Click here to see the full advisory for 2015-02-13
February 13, 2015 at 6:31

Unscheduled advisory update: The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs but will rise to CONSIDERABLE on sunny aspects today as skies clear. Both natural and human triggered wet, loose avalanches are likely today. Below 5500 feet the hazard is LOW. Ample sunshine, 1-2 feet of wet, heavy snow from 3-5 days ago, and well above freezing temperatures will cause a wet snow hazard today.

Swan Range
Click here to see the full advisory for 2015-02-13
February 13, 2015 at 6:31

Unscheduled advisory update: The hazard is MODERATE above 5500 feet due to lingering storm and persistent slabs but will rise to CONSIDERABLE on sunny aspects today as skies clear. Both natural and human triggered wet, loose avalanches are likely today. Below 5500 feet the hazard is LOW. Ample sunshine, 1-2 feet of wet, heavy snow from 3-5 days ago, and well above freezing temperatures will cause a wet snow hazard today.

Flathead Range and Glacier National Park

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