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, December 4, 2024
E.g., Wednesday, December 4, 2024
E.g., Wednesday, December 4, 2024
Date the advisory was published:sort ascending Forecast Region
Click here to see the full advisory for 2020-03-23
March 23, 2020 at 6:56

Isolated avalanche hazards linger where more than a few inches of new and drifted snow has accumulated since Saturday night. Avoid the exceptions to the generally safe conditions by avoiding pockets of drifted snow and confined terrain where sluffs of loose snow can have outsized consequences. 

Whitefish Range
Click here to see the full advisory for 2020-03-23
March 23, 2020 at 6:56

Isolated avalanche hazards linger where more than a few inches of new and drifted snow has accumulated since Saturday night. Avoid the exceptions to the generally safe conditions by avoiding pockets of drifted snow and confined terrain where sluffs of loose snow can have outsized consequences. 

Swan Range
Click here to see the full advisory for 2020-03-23
March 23, 2020 at 6:50

Isolated avalanche hazards linger where more than a few inches of new and drifted snow has accumulated since Saturday night. Avoid the exceptions to the generally safe conditions by avoiding pockets of drifted snow and confined terrain where sluffs of loose snow can have outsized consequences. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-22
March 22, 2020 at 7:22

Observers from the Swan Range continue to report safe avalanche conditions and a lack of obvious avalanche problems.  If you find more than a couple inches of fresh snow from last night, be wary of shallow sluffs and thin wind slabs near terrain traps or in extreme terrain.  

Swan Range
Click here to see the full advisory for 2020-03-22
March 22, 2020 at 6:56

A couple inches of fresh snow may be enough to form new hazards and surprise you if you've been riding consequential terrain the last few days.  Don’t let shallow sluffs or wind slabs catch you off guard near terrain traps or in extreme terrain.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-22
March 22, 2020 at 6:56

A couple inches of fresh snow may be enough to form new hazards and surprise you if you've been riding consequential terrain the last few days.  Don’t let shallow sluffs or wind slabs catch you off guard near terrain traps or in extreme terrain.  

Whitefish Range
Click here to see the full advisory for 2020-03-21
March 21, 2020 at 6:10

Another beautiful day to travel through the mountains and enjoy good stability.  Continue to practice sound travel habits in avalanche terrain to insure against isolated surprises.  Firm snow surfaces can pose a hazard if you slip and slide down a steep slope.  

Swan Range
Click here to see the full advisory for 2020-03-21
March 21, 2020 at 6:10

Another beautiful day to travel through the mountains and enjoy good stability.  Continue to practice sound travel habits in avalanche terrain to insure against isolated surprises.  Firm snow surfaces can pose a hazard if you slip and slide down a steep slope.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-21
March 21, 2020 at 6:10

Another beautiful day to travel through the mountains and enjoy good stability.  Continue to practice sound travel habits in avalanche terrain to insure against isolated surprises.  Firm snow surfaces can pose a hazard if you slip and slide down a steep slope.  

Whitefish Range
Click here to see the full advisory for 2020-03-20
March 20, 2020 at 6:30

Enjoy mostly stable conditions today. Carry rescue gear and go with a good partner. You may find isolated sluffing or stubborn, hard wind slabs. Use safe travel techniques and keep each other in sight. Sliding on firm, crusty surfaces may be a hazard.

Swan Range
Click here to see the full advisory for 2020-03-20
March 20, 2020 at 6:30

Enjoy mostly stable conditions today. Carry rescue gear and go with a good partner. You may find isolated sluffing or stubborn, hard wind slabs. Use safe travel techniques and keep each other in sight. Sliding on firm, crusty surfaces may be a hazard.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-20
March 20, 2020 at 6:30

Enjoy mostly stable conditions today. Carry rescue gear and go with a good partner. You may find isolated sluffing or stubborn, hard wind slabs. Use safe travel techniques and keep each other in sight. Sliding on firm, crusty surfaces may be a hazard.

Whitefish Range
Click here to see the full advisory for 2020-03-19
March 19, 2020 at 6:57

The snowpack is generally stable with a few exceptions. While it is unlikely for you to trigger an avalanche today, some slabs are large enough to injure or bury you. Watch for isolated wind slabs on steep slopes. Recent northeast winds have scattered these drifts erratically across exposed terrain. A large wind slab failed naturally on Tuesday. Evaluate your line carefully, especially if there are cornices looming overhead.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-19
March 19, 2020 at 6:24

The snowpack is generally stable with a few exceptions. Watch for isolated, small wind slabs on steep slopes. Recent northeast winds have scattered these drifts erratically across exposed terrain. Evaluate your line carefully, especially if there are cornices looming overhead.

Swan Range
Click here to see the full advisory for 2020-03-19
March 19, 2020 at 6:24

The snowpack is generally stable with a few exceptions. Watch for isolated, small wind slabs on steep slopes. Recent northeast winds have scattered these drifts erratically across exposed terrain. Evaluate your line carefully, especially if there are cornices looming overhead.

Whitefish Range
Click here to see the full advisory for 2020-03-18
March 18, 2020 at 6:58

There is a lingering concern that you could trigger a wind slab large enough to bury or injure you. Recent north and east winds drifted slabs onto unusual slopes and in patterns that vary basin to basin. Look at each slope with a fresh set of eyes and seek wind-sheltered terrain if you feel hollow slabs of drifted snow.  

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-18
March 18, 2020 at 6:46

Enjoy mostly stable avalanche conditions today with isolated areas of concern. Recent north and east winds drifted slabs onto unusual slopes and in patterns that vary basin to basin. Look at each slope with a fresh set of eyes and steer around isolated pockets of wind drifted snow.

Swan Range
Click here to see the full advisory for 2020-03-18
March 18, 2020 at 6:46

Enjoy mostly stable avalanche conditions today with isolated areas of concern. Recent north and east winds drifted slabs onto unusual slopes and in patterns that vary basin to basin. Look at each slope with a fresh set of eyes and steer around isolated pockets of wind drifted snow.

Whitefish Range
Click here to see the full advisory for 2020-03-17
March 17, 2020 at 6:59

Warm temperatures and clear skies will cause loose wet avalanches on sun-baked slopes. If the snow becomes wet, travel quickly and one at a time through steep, sun-exposed terrain. Be wary of wind slabs in unusual locations. Choose terrain sheltered from the wind and only expose one rider at a time in the event you trigger an unexpected slab avalanche.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-17
March 17, 2020 at 6:42

Warm temperatures and clear skies will cause loose wet avalanches on sun-baked slopes. If the snow becomes wet, travel quickly and one at a time through steep, sun-exposed terrain. Be wary of wind slabs in unusual locations. Choose terrain sheltered from the wind and only expose one rider at a time in the event you trigger an unexpected slab avalanche.

Whitefish Range
Click here to see the full advisory for 2020-03-17
March 17, 2020 at 6:42

Warm temperatures and clear skies will cause loose wet avalanches on sun-baked slopes. If the snow becomes wet, travel quickly and one at a time through steep, sun-exposed terrain. Be wary of wind slabs in unusual locations. Choose terrain sheltered from the wind and only expose one rider at a time in the event you trigger an unexpected slab avalanche.

Swan Range
Click here to see the full advisory for 2020-03-16
March 16, 2020 at 6:51

Two main clues to today's avalanche hazards: soft snow that's getting wet from sustained sun, and hard, hollow-feeling snow that's been packed by recent winds. Move on to shadier or lower-angled slopes if you find the first, and avoid crossing the second on steep slopes. The wet snow avalanche hazard will develop through the day; the wind slabs are more widespread at upper elevations, though you might find them in unusual spots.

Swan Range
Click here to see the full advisory for 2020-03-16
March 16, 2020 at 6:51

Two main clues to today's avalanche hazards: soft snow that's getting wet from sustained sun, and hard, hollow-feeling snow that's been packed by recent winds. Move on to shadier or lower-angled slopes if you find the first, and avoid crossing the second on steep slopes. The wet snow avalanche hazard will develop through the day; the wind slabs are more widespread at upper elevations, though you might find them in unusual spots.

Whitefish Range
Click here to see the full advisory for 2020-03-16
March 16, 2020 at 6:15

Two main clues to today's avalanche hazards: soft snow that's getting wet from sustained sun, and hard, hollow-feeling snow that's been packed by recent winds. Move on to shadier or lower-angled slopes if you find the first, and avoid crossing the second on steep slopes. The wet snow avalanche hazard will develop through the day; the wind slabs are more widespread at upper elevations, though you might find them in unusual spots.

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-15
March 15, 2020 at 7:03

Near-surface snow conditions are key to determining today's avalanche hazards. Where winds have hardened that snow into drifts and slabs, avoid crossing on or under steep start zones. Where the snow remains soft and loose, natural and triggered sluffs are possible. Don't let these catch you as you ride, or smack you from above while you're stopped. 

Swan Range
Click here to see the full advisory for 2020-03-15
March 15, 2020 at 7:03

Near-surface snow conditions are key to determining today's avalanche hazards. Where winds have hardened that snow into drifts and slabs, avoid crossing on or under steep start zones. Where the snow remains soft and loose, natural and triggered sluffs are possible. Don't let these catch you as you ride, or smack you from above while you're stopped. 

Whitefish Range
Click here to see the full advisory for 2020-03-15
March 15, 2020 at 6:15

Near-surface snow conditions are key to determining today's avalanche hazards. Where winds have hardened that snow into drifts and slabs, avoid crossing on or under steep start zones. Where the snow remains soft and loose, natural and triggered sluffs are possible. Don't let these catch you as you ride, or smack you from above while you're stopped. 

Flathead Range and Glacier National Park
Click here to see the full advisory for 2020-03-14
March 14, 2020 at 7:09

Keep it short, simple, and out of the wind today.  Blustery northeast winds are thickening wind slabs in wind hammered terrain.  Severe wind chill will complicate decision making and any attempts at rescue.

Swan Range
Click here to see the full advisory for 2020-03-14
March 14, 2020 at 7:09

Keep it short, simple, and out of the wind today.  Blustery northeast winds are thickening wind slabs in wind hammered terrain.  Severe wind chill will complicate decision making and any attempts at rescue.

Whitefish Range
Click here to see the full advisory for 2020-03-14
March 14, 2020 at 6:52

Keep it short, simple, and out of the wind today.  Blustery northeast winds are thickening wind slabs in wind hammered terrain.  Severe wind chill will complicate decision making and any attempts at rescue.

Flathead Range and Glacier National Park

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