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, July 24, 2017
E.g., Monday, July 24, 2017
E.g., Monday, July 24, 2017
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2017-01-31
January 31, 2017 at 7:00

Moderate to strong winds yesterday have formed fresh wind slabs and it is possible to pick up 4-7 inches of new snow today. But confidence in the weather forecast is low this morning. However, several inches of snow combined with winds will elevate the avalanche danger to CONSIDERABLE above 6000 feet as the day goes on. Watch for changing conditions and be conservative when making decisions. Drier conditions are expected in the Whitefish range – Whitefish Range advisory HERE.

Swan Range
Click here to see the full advisory for 2017-01-31
January 31, 2017 at 7:00

Moderate to strong winds yesterday have formed fresh wind slabs and it is possible to pick up 4-7 inches of new snow today. But confidence in the weather forecast is low this morning. However, several inches of snow combined with winds will elevate the avalanche danger to CONSIDERABLE above 6000 feet as the day goes on. Watch for changing conditions and be conservative when making decisions. Drier conditions are expected in the Whitefish range – Whitefish Range advisory HERE.

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-01-31
January 31, 2017 at 7:00

The avalanche danger is MODERATE above 6000 feet. Winds continue to drift snow onto leeward aspects forming fresh wind slabs and putting additional weight onto existing slabs. In some locations these slabs are being deposited on top of a rain crust. Buried weak layers still exist and remain a concern. Choose conservative terrain in areas where you find a weak snowpack structure. The Flathead and Swan ranges could see more accumulating snow today – see Flathead/Swan advisory HERE.

Whitefish Range
Click here to see the full advisory for 2017-01-30
January 30, 2017 at 6:46

The avalanche danger is MODERATE above 6000 feet. Winds increased in speed overnight and continue to drift snow onto leeward aspects forming fresh wind slabs and adding weight to existing slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before recreating on it. Despite recent warm weather, weak layers exist and are a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Whitefish Range
Click here to see the full advisory for 2017-01-30
January 30, 2017 at 6:46

The avalanche danger is MODERATE above 6000 feet. Winds increased in speed overnight and continue to drift snow onto leeward aspects forming fresh wind slabs and adding weight to existing slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before recreating on it. Despite recent warm weather, weak layers exist and are a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Swan Range
Click here to see the full advisory for 2017-01-30
January 30, 2017 at 6:46

The avalanche danger is MODERATE above 6000 feet. Winds increased in speed overnight and continue to drift snow onto leeward aspects forming fresh wind slabs and adding weight to existing slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before recreating on it. Despite recent warm weather, weak layers exist and are a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-01-29
January 29, 2017 at 6:48

The avalanche danger is MODERATE above 6000 feet. Recent winds have developed fresh wind slabs while continued windy conditions today will thicken existing slabs and create new slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Whitefish Range
Click here to see the full advisory for 2017-01-29
January 29, 2017 at 6:48

The avalanche danger is MODERATE above 6000 feet. Recent winds have developed fresh wind slabs while continued windy conditions today will thicken existing slabs and create new slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Swan Range
Click here to see the full advisory for 2017-01-29
January 29, 2017 at 6:48

The avalanche danger is MODERATE above 6000 feet. Recent winds have developed fresh wind slabs while continued windy conditions today will thicken existing slabs and create new slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose conservative terrain in areas where you find a weak snowpack structure. 

Flathead Range and southern Glacier National Park
Click here to see the full advisory for 2017-01-28
January 28, 2017 at 6:50

The avalanche danger is MODERATE above 6000 feet. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose less complex terrain in areas where you find a weak snowpack structure. Wind speeds have increased and are drifting recent low density snow onto leeward aspects forming thin wind slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it.

Whitefish Range
Click here to see the full advisory for 2017-01-28
January 28, 2017 at 6:50

The avalanche danger is MODERATE above 6000 feet. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose less complex terrain in areas where you find a weak snowpack structure. Wind speeds have increased and are drifting recent low density snow onto leeward aspects forming thin wind slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it.

Swan Range
Click here to see the full advisory for 2017-01-28
January 28, 2017 at 6:50

The avalanche danger is MODERATE above 6000 feet. Despite recent warm weather, weak layers continue to exist and be a concern in our snowpack. Choose less complex terrain in areas where you find a weak snowpack structure. Wind speeds have increased and are drifting recent low density snow onto leeward aspects forming thin wind slabs. In some locations these slabs are being deposited on top of a rain crust. Evaluate all wind loaded terrain before committing to it.

Flathead Range and southern Glacier National Park
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.

Whitefish Range
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 2017-01-27
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.

Flathead Range and southern 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 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 southern 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 southern 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 southern 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 southern 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 southern Glacier National Park

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