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., Friday, July 19, 2019
E.g., Friday, July 19, 2019
E.g., Friday, July 19, 2019
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2019-04-15
April 15, 2019 at 10:24

Avalanche activity typically continues into summer in northwest Montana. Snow stability can deteriorate quickly with subtle changes in snow, rain, wind, sun, and temperatures. Until the snow melts, assess weather, snowpack, and terrain, and practice safe travel techniques that minimize your chances of triggering slides and the consequences of triggered and natural avalanches. Consider conditions on slopes above you while you’re traveling, as many Springtime avalanche concerns involve natural avalanches.

Swan Range
Click here to see the full advisory for 2019-04-15
April 15, 2019 at 10:24

Avalanche activity typically continues into summer in northwest Montana. Snow stability can deteriorate quickly with subtle changes in snow, rain, wind, sun, and temperatures. Until the snow melts, assess weather, snowpack, and terrain, and practice safe travel techniques that minimize your chances of triggering slides and the consequences of triggered and natural avalanches. Consider conditions on slopes above you while you’re traveling, as many Springtime avalanche concerns involve natural avalanches.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-15
April 15, 2019 at 10:24

Avalanche activity typically continues into summer in northwest Montana. Snow stability can deteriorate quickly with subtle changes in snow, rain, wind, sun, and temperatures. Until the snow melts, assess weather, snowpack, and terrain, and practice safe travel techniques that minimize your chances of triggering slides and the consequences of triggered and natural avalanches. Consider conditions on slopes above you while you’re traveling, as many Springtime avalanche concerns involve natural avalanches.

Whitefish Range
Click here to see the full advisory for 2019-04-13
April 13, 2019 at 4:17

Changing conditions are underway.  Strong winds and snowfall will form increasingly thick slabs through Sunday.  Be especially cautious of leeward terrain features.  Mild temperatures and bouts of sunshine could contribute to ongoing wet loose avalanches.  The best, safest riding will be on wind protected slopes with cold snow that are free of glide cracks, but stay alert on all steep terrain if we get more than about 6 inches of new snow.  

Swan Range
Click here to see the full advisory for 2019-04-13
April 13, 2019 at 4:17

Changing conditions are underway.  Strong winds and snowfall will form increasingly thick slabs through Sunday.  Be especially cautious of leeward terrain features.  Mild temperatures and bouts of sunshine could contribute to ongoing wet loose avalanches.  The best, safest riding will be on wind protected slopes with cold snow that are free of glide cracks, but stay alert on all steep terrain if we get more than about 6 inches of new snow.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-13
April 13, 2019 at 4:17

Changing conditions are underway.  Strong winds and snowfall will form increasingly thick slabs through Sunday.  Be especially cautious of leeward terrain features.  Mild temperatures and bouts of sunshine could contribute to ongoing wet loose avalanches.  The best, safest riding will be on wind protected slopes with cold snow that are free of glide cracks, but stay alert on all steep terrain if we get more than about 6 inches of new snow.  

Whitefish Range
Click here to see the full advisory for 2019-04-11
April 11, 2019 at 6:26

Snow that's accumulated since Tuesday will be the primary avalanche concern over the next few days. Triggered and natural avalanches that break in or at the base of this snow will pose a threat on steep slopes. The nature of this threat - Storm Slabs or Loose wet - will depend on terrain-specific freezing levels and snow accumulations. Areas with more than a foot or so of fresh snow have the potential for large, dangerous avalanches. 

Swan Range
Click here to see the full advisory for 2019-04-11
April 11, 2019 at 6:26

Snow that's accumulated since Tuesday will be the primary avalanche concern over the next few days. Triggered and natural avalanches that break in or at the base of this snow will pose a threat on steep slopes. The nature of this threat - Storm Slabs or Loose wet - will depend on terrain-specific freezing levels and snow accumulations. Areas with more than a foot or so of fresh snow have the potential for large, dangerous avalanches. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-11
April 11, 2019 at 6:26

Snow that's accumulated since Tuesday will be the primary avalanche concern over the next few days. Triggered and natural avalanches that break in or at the base of this snow will pose a threat on steep slopes. The nature of this threat - Storm Slabs or Loose wet - will depend on terrain-specific freezing levels and snow accumulations. Areas with more than a foot or so of fresh snow have the potential for large, dangerous avalanches. 

Whitefish Range
Click here to see the full advisory for 2019-04-09
April 9, 2019 at 7:18

Tuesday's storm will form fresh thin slabs above 5000'. Slabs will be thickest downwind of ridgelines and in cross-loaded gullies. Look and feel for textured dense snow with cracking a sign of instability. Rain and heavy snow may result in wet slides at middle elevations. Dense sluffs could be problematic above terrain traps, cliff bands, and thick trees. Avoid recreating on slopes below glide cracks.

 

Swan Range
Click here to see the full advisory for 2019-04-09
April 9, 2019 at 7:18

Tuesday's storm will form fresh thin slabs above 5000'. Slabs will be thickest downwind of ridgelines and in cross-loaded gullies. Look and feel for textured dense snow with cracking a sign of instability. Rain and heavy snow may result in wet slides at middle elevations. Dense sluffs could be problematic above terrain traps, cliff bands, and thick trees. Avoid recreating on slopes below glide cracks.

 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-09
April 9, 2019 at 7:18

Tuesday's storm will form fresh thin slabs above 5000'. Slabs will be thickest downwind of ridgelines and in cross-loaded gullies. Look and feel for textured dense snow with cracking a sign of instability. Rain and heavy snow may result in wet slides at middle elevations. Dense sluffs could be problematic above terrain traps, cliff bands, and thick trees. Avoid recreating on slopes below glide cracks.

 

Whitefish Range
Click here to see the full advisory for 2019-04-07
April 7, 2019 at 5:46

A strong storm from the southwest will make wind slabs a problem beginning Sunday morning. As precipitation transitions to rain, the threat of large wet snow avalanches will rise. Watch for blowing snow and limit your exposure to drifts in the lee of ridgelines and in gullies. As the snowpack becomes wet, dense sluffs may run in steep terrain. Avoid slopes under glide cracks. When faced with uncertainty, be conservative with your terrain selection.

Swan Range
Click here to see the full advisory for 2019-04-07
April 7, 2019 at 5:46

A strong storm from the southwest will make wind slabs a problem beginning Sunday morning. As precipitation transitions to rain, the threat of large wet snow avalanches will rise. Watch for blowing snow and limit your exposure to drifts in the lee of ridgelines and in gullies. As the snowpack becomes wet, dense sluffs may run in steep terrain. Avoid slopes under glide cracks. When faced with uncertainty, be conservative with your terrain selection.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-07
April 7, 2019 at 5:46

A strong storm from the southwest will make wind slabs a problem beginning Sunday morning. As precipitation transitions to rain, the threat of large wet snow avalanches will rise. Watch for blowing snow and limit your exposure to drifts in the lee of ridgelines and in gullies. As the snowpack becomes wet, dense sluffs may run in steep terrain. Avoid slopes under glide cracks. When faced with uncertainty, be conservative with your terrain selection.

Whitefish Range
Click here to see the full advisory for 2019-04-06
April 6, 2019 at 6:53

Recent wet weather is weakening the snowpack on terrain with glide cracks and increasing the odds of destructive glide avalanches. Avoid traveling on or under those questionable slopes. Small loose wet avalanches may develop above about 6000 feet, especially if precipitation this afternoon starts as rain.

Swan Range
Click here to see the full advisory for 2019-04-06
April 6, 2019 at 6:53

Recent wet weather is weakening the snowpack on terrain with glide cracks and increasing the odds of destructive glide avalanches. Avoid traveling on or under those questionable slopes. Small loose wet avalanches may develop above about 6000 feet, especially if precipitation this afternoon starts as rain.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-06
April 6, 2019 at 6:53

Recent wet weather is weakening the snowpack on terrain with glide cracks and increasing the odds of destructive glide avalanches. Avoid traveling on or under those questionable slopes. Small loose wet avalanches may develop above about 6000 feet, especially if precipitation this afternoon starts as rain.

Whitefish Range
Click here to see the full advisory for 2019-04-05
April 5, 2019 at 7:06

Watch for small, isolated instabilities in the recent snow, especially if it rains at high elevations today. Avoid traveling below glide cracks: they warn of the potential for full depth avalanches.

Swan Range
Click here to see the full advisory for 2019-04-05
April 5, 2019 at 6:48

Watch for small instabilities in the recent snow.  The danger will rise to MODERATE if today's precipitation falls as rain at high elevations, spurring continued wet loose avalanche activity.  Avoid traveling below glide cracks: they warn of the potential for full depth avalanches.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-05
April 5, 2019 at 6:48

Watch for small instabilities in the recent snow.  The danger will rise to MODERATE if today's precipitation falls as rain at high elevations, spurring continued wet loose avalanche activity.  Avoid traveling below glide cracks: they warn of the potential for full depth avalanches.

Whitefish Range
Click here to see the full advisory for 2019-04-04
April 4, 2019 at 6:58

New snow overnight may be enough to create small instabilities in a few upper elevation locations; otherwise, the snowpack is generally stable.  Shallow instabilities in the new snow are most likely to get you in trouble above cliffs or in gullies.  Minimize your exposure below glide cracks. 

Swan Range
Click here to see the full advisory for 2019-04-04
April 4, 2019 at 6:43

Fresh snow overnight has increased the avalanche danger to MODERATE at upper elevations.  Shallow instabilities in the new snow are most likely to get you in trouble above cliffs or in gullies.  Minimize your exposure below glide cracks. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-04
April 4, 2019 at 6:43

Fresh snow overnight has increased the avalanche danger to MODERATE at upper elevations.  Shallow instabilities in the new snow are most likely to get you in trouble above cliffs or in gullies.  Minimize your exposure below glide cracks. 

Whitefish Range
Click here to see the full advisory for 2019-04-03
April 3, 2019 at 5:20

Avalanche problems are isolated and easy to manage. Avoid slopes below glide cracks. Watch for sluffing in steep, northerly terrain where loose, cohesionless snow exists at the snow surface. Warm, wet and windy weather may create new avalanche problems by tomorrow morning. 

Swan Range
Click here to see the full advisory for 2019-04-03
April 3, 2019 at 5:20

Avalanche problems are isolated and easy to manage. Avoid slopes below glide cracks. Watch for sluffing in steep, northerly terrain where loose, cohesionless snow exists at the snow surface. Warm, wet and windy weather may create new avalanche problems by tomorrow morning. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-03
April 3, 2019 at 5:20

Avalanche problems are isolated and easy to manage. Avoid slopes below glide cracks. Watch for sluffing in steep, northerly terrain where loose, cohesionless snow exists at the snow surface. Warm, wet and windy weather may create new avalanche problems by tomorrow morning. 

Whitefish Range
Click here to see the full advisory for 2019-04-02
April 2, 2019 at 5:36

The snowpack is generally stable, thanks to a spell of relatively cool, dry weather. Wet snow avalanches may develop this afternoon on steep slopes with more than a few inches of recent snow. Avoid slopes below glide cracks. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2019-04-02
April 2, 2019 at 5:36

The snowpack is generally stable, thanks to a spell of relatively cool, dry weather. Wet snow avalanches may develop this afternoon on steep slopes with more than a few inches of recent snow. Avoid slopes below glide cracks. 

Whitefish Range
Click here to see the full advisory for 2019-04-02
April 2, 2019 at 5:36

The snowpack is generally stable, thanks to a spell of relatively cool, dry weather. Wet snow avalanches may develop this afternoon on steep slopes with more than a few inches of recent snow. Avoid slopes below glide cracks. 

Swan Range

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