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, November 12, 2018
E.g., Monday, November 12, 2018
E.g., Monday, November 12, 2018
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2018-11-09
November 9, 2018 at 7:23

An increase in wind speeds accompanied by new snow will form shallow instabilities on high elevation, wind drifted slopes through the weekend.  Beware of thin snow coverage and buried obstacles to amplify the consequences of an avalanche.  The snowpack is generally too shallow on most mid and lower elevation terrain for avalanche concerns.

Whitefish Range
Click here to see the full advisory for 2018-11-09
November 9, 2018 at 7:23

An increase in wind speeds accompanied by new snow will form shallow instabilities on high elevation, wind drifted slopes through the weekend.  Beware of thin snow coverage and buried obstacles to amplify the consequences of an avalanche.  The snowpack is generally too shallow on most mid and lower elevation terrain for avalanche concerns.

Swan Range
Click here to see the full advisory for 2018-11-09
November 9, 2018 at 7:23

An increase in wind speeds accompanied by new snow will form shallow instabilities on high elevation, wind drifted slopes through the weekend.  Beware of thin snow coverage and buried obstacles to amplify the consequences of an avalanche.  The snowpack is generally too shallow on most mid and lower elevation terrain for avalanche concerns.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-10-31
October 31, 2018 at 16:44

Continued precipitation, warming temperatures, and gusty winds leading into this weekend will cause increasing avalanche danger on high elevation, snow-covered slopes.  Watch for changing conditions and be wary of natural avalanches.  

Swan Range
Click here to see the full advisory for 2018-10-31
October 31, 2018 at 16:44

Continued precipitation, warming temperatures, and gusty winds leading into this weekend will cause increasing avalanche danger on high elevation, snow-covered slopes.  Watch for changing conditions and be wary of natural avalanches.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-10-31
October 31, 2018 at 16:44

Continued precipitation, warming temperatures, and gusty winds leading into this weekend will cause increasing avalanche danger on high elevation, snow-covered slopes.  Watch for changing conditions and be wary of natural avalanches.  

Whitefish Range
Click here to see the full advisory for 2018-10-26
October 26, 2018 at 9:56

An active weather pattern will bring a mix of rain and snow to the mountains under a cooling trend into the first week of November.  Watch for fresh storm instabilities to develop on high elevation, north facing slopes that are harboring old, weak snow leftover from earlier in the fall.  

Swan Range
Click here to see the full advisory for 2018-10-26
October 26, 2018 at 9:56

An active weather pattern will bring a mix of rain and snow to the mountains under a cooling trend into the first week of November.  Watch for fresh storm instabilities to develop on high elevation, north facing slopes that are harboring old, weak snow leftover from earlier in the fall.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-10-26
October 26, 2018 at 9:56

An active weather pattern will bring a mix of rain and snow to the mountains under a cooling trend into the first week of November.  Watch for fresh storm instabilities to develop on high elevation, north facing slopes that are harboring old, weak snow leftover from earlier in the fall.  

Whitefish Range
Click here to see the full advisory for 2018-10-12
October 12, 2018 at 15:01

Wintery conditions have left snow cover in some mountain areas, and it is time to turn your avalanche brains back on if you are traveling in steep, snow-covered terrain.  Be cautious of wind-drifted snow below ridgelines and in gullies.  A small slide can inflict harm if it drags you over rocks and vegetation.  

Swan Range
Click here to see the full advisory for 2018-10-12
October 12, 2018 at 15:01

Wintery conditions have left snow cover in some mountain areas, and it is time to turn your avalanche brains back on if you are traveling in steep, snow-covered terrain.  Be cautious of wind-drifted snow below ridgelines and in gullies.  A small slide can inflict harm if it drags you over rocks and vegetation.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-10-12
October 12, 2018 at 15:01

Wintery conditions have left snow cover in some mountain areas, and it is time to turn your avalanche brains back on if you are traveling in steep, snow-covered terrain.  Be cautious of wind-drifted snow below ridgelines and in gullies.  A small slide can inflict harm if it drags you over rocks and vegetation.  

Whitefish Range
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Swan Range
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-15
April 15, 2018 at 19:50

Springtime generally offers a more predictable snowpack in the mountains, but avalanche activity continues into summer in Northwest Montana. Avalanche conditions are dynamic - snow stability deteriorates quickly with subtle changes in snow, rain, wind, sun, and temperatures. Continue to assess the weather, snowpack, and terrain, and practice safe travel techniques until the snow melts. 

Whitefish Range
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Swan Range
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-14
April 14, 2018 at 7:04

Several storm slabs were easily triggered in the new snow on Friday. Up to 20” of new snow is consolidating into reactive slabs over a variety of crusts and will slowly bond with old snow through the weekend. Cracks in the snow surface are a sign of instability to avoid steep terrain. Periods of sunshine on Saturday and warmer temperatures on Sunday will increase the threat of loose wet avalanches. Monitor surface warming.

Whitefish Range
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Swan Range
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-12
April 12, 2018 at 7:06

New snow and wind on Thursday will begin to form storm slabs at mid and upper elevations. As snow continues, these slabs will thicken and become more widespread. New snow is adding stress to a buried crust/ facet combo that formed earlier in the month. Watch for surface cracking in new snow and lens-shaped pillows on high elevation, leeward slopes. Warmer temps and sunshine on Friday could increase the threat of loose wet avalanches on sunny aspects.

Whitefish Range
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Swan Range
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-10
April 10, 2018 at 7:02

Warming temperatures, sunshine, and rain showers will increase the threat of shallow loose wet avalanches on Tuesday.  Look for rollerballs to indicate decreasing stability.  Cooler temperatures on Wednesday should curb wet concerns.  An increase in southwest winds through Tuesday night could form small wind slabs on high elevation, leeward terrain.  Watch for blowing snow or thicker drifts.  

Whitefish Range
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Swan Range
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-08
April 8, 2018 at 7:02

The avalanche danger remains elevated due to continued rain, dense snow, and winds. Sensitive slabs are thickening at higher elevations, while rain and wet snow are causing wet avalanche concerns lower in the terrain. Evaluate new snow totals and bonding with the underlying crust.

Whitefish Range
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Swan Range
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2018-04-07
April 7, 2018 at 7:03

This morning the avalanche danger is MODERATE. A warm wet storm will impact our area later today raising the danger to CONSIDERABLE. Wet avalanches will become a concern below the rain line and dense snow will form sensitive slabs above it. Monitor changing conditions and be alert for natural activity later today. 

Whitefish Range

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