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.
Date the advisory was published: | Forecast Region | |
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Click here to see the full advisory for 2017-01-27 |
January 27, 2017 at 6:26 The avalanche danger is MODERATE above 6000 feet. Several layers of weak, faceted snow exist in the mid-snow pack with depth hoar near the ground. These weak layers are more difficult to affect due to recent settlement and stabilizing but still warrant digging into the snow to evaluate them. Given the high consequence of triggering an avalanche on one of these deeper weak layers, it is important to choose less complex terrain where you find a weak snow pack structure. |
Swan Range |
Click here to see the full advisory for 2017-01-26 |
January 26, 2017 at 7:00 In most locations several layers of weak, faceted snow exist in the mid-snow pack with depth hoar near the ground. Though our snow pack is strengthening it remains possible to trigger an avalanche where this poor structure is found. The avalanche danger is MODERATE above 6000 feet. Dig into the snow to look for these weak layers. Where you find them avoid the likely trigger points like steep, rocky terrain and convex slopes in areas with relatively shallow snow. |
Whitefish Range |
Click here to see the full advisory for 2017-01-26 |
January 26, 2017 at 7:00 In most locations several layers of weak, faceted snow exist in the mid-snow pack with depth hoar near the ground. Though our snow pack is strengthening it remains possible to trigger an avalanche where this poor structure is found. The avalanche danger is MODERATE above 6000 feet. Dig into the snow to look for these weak layers. Where you find them avoid the likely trigger points like steep, rocky terrain and convex slopes in areas with relatively shallow snow. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-26 |
January 26, 2017 at 7:00 In most locations several layers of weak, faceted snow exist in the mid-snow pack with depth hoar near the ground. Though our snow pack is strengthening it remains possible to trigger an avalanche where this poor structure is found. The avalanche danger is MODERATE above 5000 feet. Dig into the snow to look for these weak layers. Where you find them avoid the likely trigger points like steep, rocky terrain and convex slopes in areas with relatively shallow snow. |
Swan Range |
Click here to see the full advisory for 2017-01-25 |
January 25, 2017 at 6:23 The avalanche danger is MODERATE above 6000 feet. Warmer temperatures and lack of recent snow allowed the snow pack to consolidate and strengthen. However, layers weak snow exist in many areas and human triggered avalanches remain possible. Dig into the snow and evaluate the snow pack before committing to a slope. Look for weak snow with an overlying slab and choose appropriate terrain where present. Avoid steep, rocky areas with shallow snow where you can more easily trigger an avalanche. |
Whitefish Range |
Click here to see the full advisory for 2017-01-25 |
January 25, 2017 at 6:23 The avalanche danger is MODERATE above 6000 feet. Warmer temperatures and lack of recent snow allowed the snow pack to consolidate and strengthen. However, layers weak snow exist in many areas and human triggered avalanches remain possible. Dig into the snow and evaluate the snow pack before committing to a slope. Look for weak snow with an overlying slab and choose appropriate terrain where present. Avoid steep, rocky areas with shallow snow where you can more easily trigger an avalanche. |
Swan Range |
Click here to see the full advisory for 2017-01-25 |
January 25, 2017 at 6:23 The avalanche danger is MODERATE above 6000 feet. Warmer temperatures and lack of recent snow allowed the snow pack to consolidate and strengthen. However, layers weak snow exist in many areas and human triggered avalanches remain possible. Dig into the snow and evaluate the snow pack before committing to a slope. Look for weak snow with an overlying slab and choose appropriate terrain where present. Avoid steep, rocky areas with shallow snow where you can more easily trigger an avalanche. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-24 |
January 24, 2017 at 7:00 Multiple weak layers are buried in our snowpack right now. Human triggered avalanches remain possible and the avalanche danger is MODERATE above 5000 feet. Avoid areas with a shallow snowpack such as steep, rocky terrain where you can more easily trigger an avalanche. Be aware of wind loaded slopes where cohesive wind slabs may have been deposited on persistent weak layers, especially above treeline. Choose safer terrain if you are uncertain about the stability of the snow. |
Whitefish Range |
Click here to see the full advisory for 2017-01-24 |
January 24, 2017 at 7:00 Multiple weak layers are buried in our snowpack right now. Human triggered avalanches remain possible and the avalanche danger is MODERATE above 5000 feet. Avoid areas with a shallow snowpack such as steep, rocky terrain where you can more easily trigger an avalanche. Be aware of wind loaded slopes where cohesive wind slabs may have been deposited on persistent weak layers, especially above treeline. Choose safer terrain if you are uncertain about the stability of the snow. |
Swan Range |
Click here to see the full advisory for 2017-01-24 |
January 24, 2017 at 7:00 Multiple weak layers are buried in our snowpack right now. Human triggered avalanches remain possible and the avalanche danger is MODERATE above 5000 feet. Avoid areas with a shallow snowpack such as steep, rocky terrain where you can more easily trigger an avalanche. Be aware of wind loaded slopes where cohesive wind slabs may have been deposited on persistent weak layers, especially above treeline. Choose safer terrain if you are uncertain about the stability of the snow. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-23 |
January 23, 2017 at 6:46 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on buried weak layers in our pack. Avoid areas with a shallow snowpack, like steep rocky terrain, where you can more easily affect these weak layers. In alpine terrain, the possibility of a human triggered avalanche involving lingering wind slab instabilities remains. Assess wind loaded slopes before committing to them. |
Whitefish Range |
Click here to see the full advisory for 2017-01-23 |
January 23, 2017 at 6:46 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on buried weak layers in our pack. Avoid areas with a shallow snowpack, like steep rocky terrain, where you can more easily affect these weak layers. In alpine terrain, the possibility of a human triggered avalanche involving lingering wind slab instabilities remains. Assess wind loaded slopes before committing to them. |
Swan Range |
Click here to see the full advisory for 2017-01-23 |
January 23, 2017 at 6:46 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on buried weak layers in our pack. Avoid areas with a shallow snowpack, like steep rocky terrain, where you can more easily affect these weak layers. In alpine terrain, the possibility of a human triggered avalanche involving lingering wind slab instabilities remains. Assess wind loaded slopes before committing to them. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-22 |
January 22, 2017 at 6:31 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on steep wind loaded slopes in alpine terrain and in areas with a shallow snowpack where it is easier to affect deeper weak layers. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Whitefish Range |
Click here to see the full advisory for 2017-01-22 |
January 22, 2017 at 6:31 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on steep wind loaded slopes in alpine terrain and in areas with a shallow snowpack where it is easier to affect deeper weak layers. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Swan Range |
Click here to see the full advisory for 2017-01-22 |
January 22, 2017 at 6:31 The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible on steep wind loaded slopes in alpine terrain and in areas with a shallow snowpack where it is easier to affect deeper weak layers. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-21 |
January 21, 2017 at 6:29 Concerns in our snowpack remain with the variety of weak layers in our pack along with wind slabs that formed earlier in the week. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Whitefish Range |
Click here to see the full advisory for 2017-01-21 |
January 21, 2017 at 6:29 Concerns in our snowpack remain with the variety of weak layers in our pack along with wind slabs that formed earlier in the week. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Swan Range |
Click here to see the full advisory for 2017-01-21 |
January 21, 2017 at 6:29 Concerns in our snowpack remain with the variety of weak layers in our pack along with wind slabs that formed earlier in the week. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-20 |
January 20, 2017 at 6:39 The cooler temperatures overnight helped to stabilize the surface snow, but weak layers lurk deeper in the snow pack. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Whitefish Range |
Click here to see the full advisory for 2017-01-20 |
January 20, 2017 at 6:39 The cooler temperatures overnight helped to stabilize the surface snow, but weak layers lurk deeper in the snow pack. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Swan Range |
Click here to see the full advisory for 2017-01-20 |
January 20, 2017 at 6:39 The cooler temperatures overnight helped to stabilize the surface snow, but weak layers lurk deeper in the snow pack. The avalanche danger is MODERATE above 5000 feet. Human triggered avalanches are possible particularly on steep, wind loaded slopes and terrain with shallow snow where it is easier to affect deeper instabilities. Dig into the snow to look for these weak, faceted layers and carefully assess recently wind loaded terrain before committing to it. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-19 |
January 19, 2017 at 7:00 The latest system brought about rapid change to the snow pack with added water weight, wind transported snow, and warming temperatures. Dangerous conditions exist in the upper elevations. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully evaluate the snow pack and choose conservative terrain while it adjusts to the recent stress. |
Whitefish Range |
Click here to see the full advisory for 2017-01-19 |
January 19, 2017 at 7:00 The latest system brought about rapid change to the snow pack with added water weight, wind transported snow, and warming temperatures. Dangerous conditions exist in the upper elevations. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully evaluate the snow pack and choose conservative terrain while it adjusts to the recent stress. |
Swan Range |
Click here to see the full advisory for 2017-01-19 |
January 19, 2017 at 7:00 The latest system brought about rapid change to the snow pack with added water weight, wind transported snow, and warming temperatures. Dangerous conditions exist in the upper elevations. The avalanche danger is CONSIDERABLE above 6000 feet. Carefully evaluate the snow pack and choose conservative terrain while it adjusts to the recent stress. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-18 |
January 18, 2017 at 7:00 How warm and how much precipitation? Confidence in weather forecasts is low and conditions could be highly variable. Wind slabs continue to develop and snow structure isn't favorable for increased load or rapid warming. The avalanche danger is CONSIDERABLE at all elevations. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures or precipitation may increase the avalanche danger. |
Whitefish Range |
Click here to see the full advisory for 2017-01-18 |
January 18, 2017 at 7:00 How warm and how much precipitation? Confidence in weather forecasts is low and conditions could be highly variable. Wind slabs continue to develop and snow structure isn't favorable for increased load or rapid warming. The avalanche danger is CONSIDERABLE at all elevations. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures or precipitation may increase the avalanche danger. |
Swan Range |
Click here to see the full advisory for 2017-01-18 |
January 18, 2017 at 7:00 How warm and how much precipitation? Confidence in weather forecasts is low and conditions could be highly variable. Wind slabs continue to develop and snow structure isn't favorable for increased load or rapid warming. The avalanche danger is CONSIDERABLE at all elevations. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures or precipitation may increase the avalanche danger. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2017-01-17 |
January 17, 2017 at 6:56 Southwest winds have increased overnight likely forming fresh wind slabs. Older wind slabs have been slow to strengthen. Weak layers formed earlier in the season have continued to weaken and remain a concern. The avalanche danger is MODERATE above 5000 feet. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures may increase the avalanche danger. |
Whitefish Range |
Click here to see the full advisory for 2017-01-17 |
January 17, 2017 at 6:56 Southwest winds have increased overnight likely forming fresh wind slabs. Older wind slabs have been slow to strengthen. Weak layers formed earlier in the season have continued to weaken and remain a concern. The avalanche danger is MODERATE above 5000 feet. Carefully evaluate the snowpack and your terrain choices. Pay close attention to the changing weather today and be aware that quickly warming temperatures may increase the avalanche danger. |
Swan Range |