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., Thursday, December 14, 2017
E.g., Thursday, December 14, 2017
E.g., Thursday, December 14, 2017
Date the advisory was published:sort descending
Click here to see the full advisory for 2017-02-06
February 6, 2017 at 15:50

High avalanche danger exists across the forecast area. Travel in avalanche terrain is not recommended.  Stay  off slopes steeper than 30 degrees above the 4,000 foot elevation.  

 

Advisory
Click here to see the full advisory for 2017-02-06
February 6, 2017 at 15:50

High avalanche danger exists across the forecast area. Travel in avalanche terrain is not recommended.  Stay  off slopes steeper than 30 degrees above the 4,000 foot elevation.  

 

Advisory
Click here to see the full advisory for 2017-03-03
March 3, 2017 at 7:00

In the Cabinet Mountains near Lunch peak we found 9 feet of snow with calm winds and below freezing temperatures.  Above the thick icecrust formed 3 weeks ago, we have received 3 feet of low density fluff with the top 3 inches starting to slab up from the recent winds since Wednesday.  

Advisory
Click here to see the full advisory for 2017-03-03
March 3, 2017 at 11:32

In the Bitteroots near Lookout Pass we have 3 feet recent storm snow which has a decent bond to the 8 inch icecrust from 3 weeks ago with some instability within the top 3 feet of storm snow due minor snow density changes between these storms.  Things are starting to consolidate.  The upper few inches of snow have some wind affect in most areas with more on steep exposed upper elevations.  

Advisory
Click here to see the full advisory for 2017-03-03
March 3, 2017 at 11:32

In the Bitteroots near Lookout Pass we have 3 feet recent storm snow which has a decent bond to the 8 inch icecrust from 3 weeks ago with some instability within the top 3 feet of storm snow due minor snow density changes between these storms.  Things are starting to consolidate.  The upper few inches of snow have some wind affect in most areas with more on steep exposed upper elevations.  

Advisory
Click here to see the full advisory for 2017-03-07
March 7, 2017 at 13:18

MODERATE avalanche danger today for mid and upper elevations for the entire forecast region with isolated areas of considerable in steep exposed terrain near ridgetops on windloaded aspects N, NE, E.  With increase in wind, snow and temperatures watch for heavier snow on lighter snow in the upcoming storms producing 1.5 feet of new storm snow weak layers.

Advisory
Click here to see the full advisory for 2017-03-07
March 7, 2017 at 13:18

MODERATE avalanche danger today for mid and upper elevations for the entire forecast region with isolated areas of considerable in steep exposed terrain near ridgetops on windloaded aspects N, NE, E.  With increase in wind, snow and temperatures watch for heavier snow on lighter snow in the upcoming storms producing 1.5 feet of new storm snow weak layers.

Advisory
Click here to see the full advisory for 2017-03-10
March 10, 2017 at 7:02

We've received about 1 foot of snow on the level since last week and steady westerly winds have piled it up even deeper on lee aspects.  Warming temperatures with the most recent accumulation of several inches last night will have created an unstable situation at the surface, particularly in those wind-loaded areas.  Touching off a small slab in steep terrain could step down to lower layers.  

Advisory
Click here to see the full advisory for 2017-03-10
March 10, 2017 at 7:20

Melissa and MIiles found about 110cm of new snow since the rain 3 weeks ago. So far, it has all landed right side up and settling. Snowfall yesterday was already beginning to get denser as they were headed out.  Concerns are windslabs in the N-NE-E aspects near and above treeline and the recent storm slabs.  

Advisory
Click here to see the full advisory for 2017-03-14
March 14, 2017 at 20:22
Advisory
Click here to see the full advisory for 2017-03-14
March 14, 2017 at 20:22
Advisory
Click here to see the full advisory for 2017-03-17
March 17, 2017 at 7:37

Even though we've seen a lot of rain in the snow pack at 6000', temperatures at night have been cold enough to keep the upper portions of the pack mostly frozen. Rain has percolated through the pack about 60-90cm down.  Temperatures in the mid 20's at night are helping keep the snow pack locked in place. If temps. warm up it could quickly become a different story. 

Advisory
Click here to see the full advisory for 2017-03-17
March 17, 2017 at 7:53

Mid 20 temperatures at night have helped the avalanche danger. The snow pack is just barely seeing cold enough nights to keep it in place. Look for a weaker snow pack to develop quickly when temps warm up.  

Advisory
Click here to see the full advisory for 2017-03-22
March 22, 2017 at 9:24
Advisory
Click here to see the full advisory for 2017-03-22
March 22, 2017 at 9:24
Advisory
Click here to see the full advisory for 2017-03-24
March 24, 2017 at 7:08

Avalanche hazard is being held in check by the melt/freeze conditions from the last few days and nights.  The pack is isothermal and there are no serious lingering weak layers in the upper 3 feet above the thick crust.  New snow and warming temperatures will be your main concern later today and this weekend.

Advisory
Click here to see the full advisory for 2017-03-24
March 24, 2017 at 7:38

Currently Crust on Surface with warming temps and snow today which could lead to loose wet slides on steeper terrain over 32 degrees on all aspects.  Avalanche hazard is being held in check by the melt/freeze conditions from the last few days and nights.  The pack is isothermal and there are no serious lingering weak layers in the upper 3 feet above the thick crust.  New snow and warming temperatures will be your main concern later today and this weekend.

Advisory
Click here to see the full advisory for 2017-03-28
March 28, 2017 at 17:05

With no major concerns for weak layers in the existing pack the thing to watch is the accumulation of new snow and wind.  The mountains have received about 3 inches of new snow in the last 24 hours and winds have loaded lee aspects more deeply.  Look for weak layers between changes in density.  More snow and wind forecast for tomorrow.

Advisory
Click here to see the full advisory for 2017-03-28
March 28, 2017 at 17:24

Temperatures are on the warm side and new snow is accumulating with westerly winds.  Watch wind loading on lee aspects.  Weak layers may form as changes in density new snow.  The pack may be getting a little rotten and that increases your chances of setting off loose wet sloughs. 

Advisory
Click here to see the full advisory for 2017-03-31
March 31, 2017 at 7:05

Welcome to Spring! The snowpack in the Selkirks and Cabinets has gone isothermic. If we see an increase in temperature there could be an increased avalanche danger but right now overnight temperatures are cold enough to keep snow from moving.

Advisory
Click here to see the full advisory for 2017-03-31
March 31, 2017 at 7:22

The snowpack has gone isothermic. That means the temperature outside will be a good indicator for figuring out the avalanche danger. Right now freezing temperatures over night are keeping the avalanche danger low. An increase in temperature could increase instabilities. For now, enjoy the spring riding!

Advisory
Click here to see the full advisory for 2017-03-31
March 31, 2017 at 7:22

The snowpack has gone isothermic. That means the temperature outside will be a good indicator for figuring out the avalanche danger. Right now freezing temperatures over night are keeping the avalanche danger low. An increase in temperature could increase instabilities. For now, enjoy the spring riding!

Advisory
Click here to see the full advisory for 2017-04-05
April 5, 2017 at 8:20

I was sure nice to see the sunshine yesterday! I dug a snowpit yesterday north of Schweitzer mountain in the Selkirks (6200ft). There is 30-40cm crust near the surface that is very supportive. I don't see the avalanche danger increasing until that thick crust gets broken down. Rain and warm temperatures might try to break down the crust layer but my feeling is that overnight temperatures will be cold enough to keep it intact for the extent of this forecast.

Advisory
Click here to see the full advisory for 2017-04-05
April 5, 2017 at 8:20

I was sure nice to see the sunshine yesterday! I dug a snowpit yesterday north of Schweitzer mountain in the Selkirks (6200ft). There is 30-40cm crust near the surface that is very supportive. I don't see the avalanche danger increasing until that thick crust gets broken down. Rain and warm temperatures might try to break down the crust layer but my feeling is that overnight temperatures will be cold enough to keep it intact for the extent of this forecast.

Advisory
Click here to see the full advisory for 2017-04-07
April 7, 2017 at 7:23

The rain and warm temperatures have made an effect on the snowpack. Yesterday in the Cabinet mountains, we found the supportive crust near the surface layer mostly gone.  Skier and snowmobiler triggered slides are unlikely but natural wet slides are possible. We did see a wet slide (D2) yesterday that covered the Tressle ck. road. The more unsupportable the snow the greater chance of seeing some avalanche activity.

 

Advisory
Click here to see the full advisory for 2017-04-07
April 7, 2017 at 7:34

The supportive crust near the surface of the snowpack is breaking down quickly with the warm temperatures and rain. The rain percolating through the snowpack will break down some of the strength. Expect to see unsupportable snow in the backcountry. Human triggered avalanches are still unlikely but possible. Natural avalanches are a possibility especially on steep slopes with a smooth bed surface. Safe travels!

Advisory
Click here to see the full advisory for 2017-04-11
April 11, 2017 at 13:55

With todays sun and warm temperatures the avalanche danger is on the rise. Be aware of wet / loose avalanche activity, especially on solar aspects. Enjoy the sunshine!

Advisory
Click here to see the full advisory for 2017-04-11
April 11, 2017 at 14:04

I hope you're all out enjoying the sunshine! The avalanche danger is on the rise while the sun is out. With these warm temperatures and solar radiation be aware of the possibility of wet avalanches.  Solar aspects will be the most likely spot to find unstable snow. 

Advisory
Click here to see the full advisory for 2017-04-14
April 14, 2017 at 7:59

 This will be the last advisory of the season. Check out our Facebook site later this afternoon for some spring snow tips! Thanks for following us this season and look forward to bringing you all more avalanche information next winter. Have a good summer!

Advisory
Click here to see the full advisory for 2017-04-14
April 14, 2017 at 7:59

 This will be the last advisory of the season. Check out our Facebook site later this afternoon for some spring snow tips! Thanks for following us this season and look forward to bringing you all more avalanche information next winter. Have a good summer!

Advisory
Click here to see the full advisory for 2017-04-25
April 25, 2017 at 10:28

Thank you to everyone who helped IPAC withour mission to provide avalanche education and post weekly avalanche advisories for the public.  This year was one to remember with many great days in the mountains.  There are still good times to be had so check out the Education page for Spring Touring/Riding Tips.  Cheers!

Advisory
Click here to see the full advisory for 2017-04-25
April 25, 2017 at 10:28

Thank you to everyone who helped IPAC withour mission to provide avalanche education and post weekly avalanche advisories for the public.  This year was one to remember with many great days in the mountains.  There are still good times to be had so check out the Education page for Spring Touring/Riding Tips.  Cheers!

Advisory
Click here to see the full advisory for 2017-11-01
November 1, 2017 at 10:48

The NWS has issued a Winter Storm Watch for the northern portion of the Idaho Panhandle.  Expect a cold front to bring heavy snowfall from Wednesday evening through Friday morning.  Avalanche hazards could exist in high elevation avalanche start zones, especially on northerly aspects.  

Advisory
Click here to see the full advisory for 2017-11-01
November 1, 2017 at 10:48

The NWS has issued a Winter Storm Watch for the northern portion of the Idaho Panhandle.  Expect a cold front to bring heavy snowfall from Wednesday evening through Friday morning.  Avalanche hazards could exist in high elevation avalanche start zones, especially on northerly aspects.  

Advisory
Click here to see the full advisory for 2017-12-08
December 8, 2017 at 6:16

It's been at least 2 weeks since the Cabinet or Selkirk mountians have seen any new snowfall. The recent high presusure and colder temperatures have started to break down the snowpack (near surface faceting). In most areas the snowpack can be summed up in 2 parts. The bottom half of the pack is old firm frozen snow and the upper portions of the pack is light unconsolidated snow. In it's current state the snowpack doesn't present much avalanche danger. 

Advisory
Click here to see the full advisory for 2017-12-08
December 8, 2017 at 6:16

It's been at least 2 weeks since the Cabinet or Selkirk mountians have seen any new snowfall. The recent high presusure and colder temperatures have started to break down the snowpack (near surface faceting). In most areas the snowpack can be summed up in 2 parts. The bottom half of the pack is old firm frozen snow and the upper portions of the pack is light unconsolidated snow. In it's current state the snowpack doesn't present much avalanche danger. 

Advisory
Click here to see the full advisory for 2017-12-08
December 8, 2017 at 6:51

Rain and warm temperatures over Thanksgiving had a toll on the depth of our snowpack. The newer snow is fairly well bonded to the Thanksgiving crust, but small windloaded pockets were observed on all aspectsSurface hoar and near surface faceting was also observed.  Looking ahead at the weather forecast, no new precipitation is expected for a while and daytime highs over the weekend could form sun crusts.

Advisory
Click here to see the full advisory for 2017-12-08
December 8, 2017 at 11:15

With not much snow recently or much in the future, the forecast area will remain at a LOW danger rating. The biggest area of concern would be above treeline on steep slopes. Loose snow avalanches are possible in isolated areas.

Advisory
Click here to see the full advisory for 2017-12-12
December 12, 2017 at 6:31

Not a lot has changed with the weather or snowpack since the last advisory. The good news is... most area have a firm base of snow to help limit the amount of basal rotting that's typical during long spells of high pressure. The bad news is... the upper portion of the pack has 2 distinct weak layers and is not supportive enough to receive more snow on top of it.

Advisory
Click here to see the full advisory for 2017-12-12
December 12, 2017 at 7:19

The snow trends in the mountains are currently being driven by the inversion.  Large surface hoar was found on all aspects below 5100' , with smaller hoar found at higher elevations.  Near surface faceting found on all aspects. The pack hasn't changed much since Thursday with some melt freeze crusts forming on the southern aspects at higher elevations.  

Advisory
Click here to see the full advisory for Kootenai S
December 1, 2014 at 15:37
Snowpack Summary
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December 12, 2014 at 5:56
Snowpack Summary
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December 16, 2014 at 6:00
Snowpack Summary
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December 18, 2014 at 14:47
Snowpack Summary
Click here to see the full advisory for Kootenai S
December 22, 2014 at 16:10
Snowpack Summary
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December 25, 2014 at 6:00
Snowpack Summary
Click here to see the full advisory for Kootenai S
December 30, 2014 at 6:00
Snowpack Summary
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December 4, 2014 at 15:14
Snowpack Summary
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December 9, 2014 at 6:00
Snowpack Summary
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April 3, 2015 at 6:00
Snowpack Summary
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December 24, 2015 at 18:28
Snowpack Summary
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December 31, 2015 at 15:43
Snowpack Summary
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February 10, 2015 at 6:00
Snowpack Summary
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February 13, 2015 at 6:00
Snowpack Summary
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February 18, 2015 at 6:00
Snowpack Summary
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February 20, 2015 at 6:00
Snowpack Summary
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February 25, 2015 at 5:57
Snowpack Summary
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February 27, 2015 at 6:00
Snowpack Summary
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February 3, 2015 at 6:00
Snowpack Summary
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February 6, 2015 at 6:00
Snowpack Summary
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February 7, 2015 at 6:00
Snowpack Summary
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January 13, 2015 at 6:00
Snowpack Summary
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January 16, 2015 at 6:00
Snowpack Summary
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January 18, 2015 at 6:33
Snowpack Summary
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January 21, 2015 at 4:00
Snowpack Summary
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January 23, 2015 at 6:00
Snowpack Summary
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January 27, 2015 at 6:00
Snowpack Summary
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January 30, 2015 at 6:00
Snowpack Summary
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January 5, 2015 at 15:20
Snowpack Summary
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January 9, 2015 at 5:25
Snowpack Summary
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March 10, 2015 at 6:00
Snowpack Summary
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March 13, 2015 at 5:03
Snowpack Summary
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March 15, 2015 at 8:07
Snowpack Summary
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March 20, 2015 at 6:00
Snowpack Summary
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March 27, 2015 at 6:00
Snowpack Summary
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March 3, 2015 at 5:55
Snowpack Summary
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March 5, 2015 at 16:35
Snowpack Summary
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November 16, 2015 at 20:30
Snowpack Summary
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November 30, 2015 at 12:51
Snowpack Summary
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December 16, 2016 at 5:38
Snowpack Summary
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December 20, 2016 at 17:30
Snowpack Summary
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December 23, 2016 at 6:00
Snowpack Summary
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December 27, 2016 at 6:10
Snowpack Summary
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December 31, 2016 at 17:30
Snowpack Summary
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February 12, 2016 at 6:00
Snowpack Summary
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February 19, 2016 at 6:00
Snowpack Summary
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February 26, 2016 at 8:07
Snowpack Summary
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February 5, 2016 at 6:41
Snowpack Summary
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January 15, 2016 at 6:00
Snowpack Summary
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January 22, 2016 at 6:00
Snowpack Summary
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January 28, 2016 at 17:00
Snowpack Summary
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January 8, 2016 at 6:00
Snowpack Summary
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March 11, 2016 at 14:34
Snowpack Summary
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March 18, 2016 at 6:00
Snowpack Summary
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March 25, 2016 at 6:00
Snowpack Summary
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March 4, 2016 at 6:00
Snowpack Summary
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December 5, 2017 at 7:42
Snowpack Summary
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February 10, 2017 at 6:15
Snowpack Summary
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February 14, 2017 at 8:00
Snowpack Summary
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February 16, 2017 at 8:06
Snowpack Summary

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