Turnagain Pass Archives

Date	Problem #1	Problem #2	The Bottom Line
Mon, January 30th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is MODERATE above 1000′. It is possible for a person to trigger a large avalanche on a weak layer of surface hoar buried 2-3′ deep. It is also possible to find reactive wind slabs that formed in the past 24 hours on isolated upper-elevation slopes. If you plan on moving into steeper terrain, take [Read More]
Sun, January 29th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is MODERATE above 1,000′ on all aspects. Triggering a large slab 2-3′ deep on a layer of buried surface hoar is becoming less likely, but is still possible. Upper elevation slopes without surface crusts are the most likely places to trigger a large slab. Additionally, blustery ridgetop winds could form some small [Read More]
Sat, January 28th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger remains CONSIDERABLE above 2500′. Large human triggered avalanches are possible on a layer of buried surface hoar 1-3′ deep above 2000′. This weak layer is gradually becoming less reactive, but has been responsible for many human triggered avalanches and near misses over the past few weeks. We recommend continuing to travel on low angle [Read More]
Fri, January 27th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger will remain CONSIDERABLE at the higher elevations, above 2,500′. Triggering a 2′ deep slab avalanche remains likely on slopes steeper than 30 degrees. These avalanches are breaking in buried surface hoar and can release after several people have been on a slope. Additionally, give cornices an extra wide berth as some could [Read More]
Thu, January 26th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 2,500′. Human triggered avalanches 1-3′ deep on a layer of buried surface hoar remain likely. This type of weak layer can be remotely triggered from low angle slopes onto adjacent steeper terrain. It is also possible to trigger an avalanche on a deeper weak layer 4-8′ deep. We recommend [Read More]
Wed, January 25th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 1,000′ on all aspects. Triggering a slab avalanche around 2′ remains likely. These slabs are failing on buried surface hoar and can be triggered remotely (from the side, top, or bottom) of a slope. Additionally, other avalanche problems such as cornice falls and wind slabs could be found at [Read More]
Tue, January 24th, 2023	Persistent Slabs	Deep Persistent Slabs	The danger is HIGH above 2500′ as strong winds will make fresh wind slabs, pushing weak layers in the upper snowpack to their limit. Natural avalanches 2-4′ deep are likely and human triggered avalanches are very likely, which means travel in and below steep avalanche terrain is not recommended. The danger is CONSIDERABLE below 2500′. Winds will be a [Read More]
Mon, January 23rd, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 1000′. It is likely a person can trigger an avalanche 2′ deep on a weak layer of buried surface hoar. There have been human-triggered avalanches on this layer for 8 days in a row, and conditions will remain dangerous despite the relatively quiet weather expected today. It is also possible to [Read More]
Sun, January 22nd, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is expected to rise to HIGH today above 2,500′ due to strong ridgetop winds and snowfall. Large natural slab avalanches (2-3+ feet deep) will likely occur at the high elevations while human triggered slabs will be very likely to trigger. The danger is CONSIDERABLE below 2,500′ where natural avalanches are possible yet [Read More]
Sat, January 21st, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 1000′ today. We have a dangerous combination of nice weather, soft snow, and a very unstable snowpack that commonly leads to avalanche accidents. Human triggered avalanches 1-3′ deep on a buried layer of surface hoar are likely. Triggering an avalanche from low angle terrain onto steeper adjacent slopes is also likely [Read More]
Fri, January 20th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 1000′. Strong easterly winds should taper off mid-day, but the current snowpack still makes it likely a person can trigger an avalanche on buried surface hoar 1-2′ deep, and it is possible to trigger a much bigger avalanche on weak snow buried 3-7′ deep or deeper. This is an unusually dangerous [Read More]
Thu, January 19th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger is HIGH above 2500′ today. Strong winds over the past 24 hours have been transporting snow onto buried weak layers that are likely to produce natural avalanches and very likely to produce human triggered avalanches 1-3’+ deep. It is also possible to trigger a very large avalanche on a buried weak layer [Read More]
Wed, January 18th, 2023	Persistent Slabs	Deep Persistent Slabs	The avalanche danger remains CONSIDERABLE above 1,000′. Triggering a 2′ deep slab avalanche is still likely, several occurred yesterday. Avalanches are breaking in buried surface hoar, being triggered remotely (from the side, top, or below), and releasing in treed areas and open areas. Increasing ridgetop winds today may create fresh wind slabs in the higher [Read More]
Tue, January 17th, 2023	Storm Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE at all elevations. Last night’s storm brought around a foot of new snow along with strong easterly winds, forming touchy slabs on top of a snowpack with multiple weak layers. It is likely a person can trigger an avalanche in the upper 1-2′ of the snowpack, and possible to trigger a very [Read More]
Mon, January 16th, 2023	Wind Slabs	Deep Persistent Slabs	The danger is CONSIDERABLE above 2500′. Last night brought a few inches of new snow with strong easterly winds, which will make human-triggered wind slab avalanches likely today, and natural avalanches possible. These fresh wind slabs are loading a snowpack with multiple weak layers, one of which is 1-2′ deep, while the other is 3-6′ deep or [Read More]
Sun, January 15th, 2023	Wind Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE above 2,500′ due to continued ridgetop winds. Wind slab avalanches 1-2′ deep are likely to be triggered by people on slopes with recent wind loading. Slabs could be sitting on buried surface hoar, making them larger and easier to trigger. It is also still possible to trigger a very large [Read More]
Sat, January 14th, 2023	Deep Persistent Slabs	Wind Slabs	The avalanche danger is CONSIDERABLE above 2500′. It is still possible to trigger a very large avalanche 3-6′ deep on a buried weak layer. The potential for remote triggering a very large avalanche also exists, so it is important to be aware of steep terrain above you. Moderate to strong winds and light snowfall today will [Read More]
Fri, January 13th, 2023	Deep Persistent Slabs	Wind Slabs	The avalanche danger remains MODERATE above 1000′. Triggering a very large avalanche 3-6′ deep on a buried weak layer is still possible. Remote triggering one of these avalanches is also possible, which means you could trigger an avalanche from low angle terrain onto steeper slopes above, to the sides, or below where you are travelling. In addition, [Read More]
Thu, January 12th, 2023	Deep Persistent Slabs	Wind Slabs	The avalanche danger is MODERATE above 1000′ today. It is still possible for people to trigger a very large avalanche 3-6’+ deep on a buried weak layer. There have been several near misses on this layer in the past week and unfortunately this type of weak layer takes a long time to go away. We recommend conservative [Read More]
Wed, January 11th, 2023	Persistent Slabs	Wind Slabs	The avalanche danger remains CONSIDERABLE above 2500′. Several inches of new snow with strong easterly winds yesterday likely formed fresh wind slabs. These should be around a foot thick and could be easy to trigger. Additionally, either a wind slab or person has the potential to trigger a very large avalanche on weak snow buried 3-6′ [Read More]
Tue, January 10th, 2023	Wind Slabs	Persistent Slabs	The avalanche danger is CONSIDERABLE above 2500′. Strong easterly winds are increasing through the day, making human-triggered avalanches likely and natural avalanches possible. A wind slab avalanche failing 1-2′ deep in freshly wind-loaded snow may trigger a very large avalanche on weak snow buried 3-6′ deep. Dangerous avalanche conditions will require cautious route finding, which means avoiding [Read More]
Mon, January 9th, 2023	Persistent Slabs		The avalanche danger is CONSIDERABLE above 2500′. There have been very large human-triggered avalanches two out of the past four days, breaking 3-6′ deep and very wide, connecting across very different terrain features. This unusually dangerous snowpack requires a cautious mindset, and the best bet is to stick to low-angle terrain. The danger is MODERATE between 1000′ and [Read More]
Sun, January 8th, 2023	Persistent Slabs		Traveling in the upper elevation backcountry right now follows the advice for CONSIDERABLE avalanche danger; conservative terrain selection and an extra cautious mindset. Two very large slabs were triggered yesterday by skiers, with debris running into valley bottoms and over up-tracks. Triggering a large and dangerous slab is again possible today. Slabs are failing on [Read More]
Sat, January 7th, 2023	Persistent Slabs		The avalanche danger is MODERATE above 1000′ today. Triggering a very large avalanche on a buried weak layer 3-6′ deep is possible. We have seen widespread avalanches on deeply buried weak layers this week, including many human triggered avalanches that were remote triggered from low angle terrain adjacent to steeper slopes. We recommend conservative terrain selection and [Read More]
Fri, January 6th, 2023	Persistent Slabs		The avalanche danger remains CONSIDERABLE above 2,500′ and MODERATE between 1000′ and 2,500′. Several large and dangerous avalanches were triggered by people yesterday and we recommend an extra cautious mindset again today. Large slabs were breaking in buried weak layers with crowns 3-8′ deep. These types of avalanches could be triggered by people again today. [Read More]

Below are archived forecasts for the past 5 seasons with the highest danger rating and Avalanche Problem 1 displayed in the chart. Click on a table cell to read the forecast for that day. Alternatively you can view this page for 10 seasons of data plus embedded observations from that day.

Date	25/26	24/25	23/24	22/23	21/22
11/25	No Rating	No Rating	Wet Loose	Wind Slabs	Storm Slabs
11/26	No Rating	No Rating	Wet Loose	Wind Slabs	Persistent Slabs
11/27	No Rating	No Rating	Wind Slabs	Wind Slabs	Persistent Slabs
11/28	No Rating	No Rating	Wind Slabs	Wind Slabs	Persistent Slabs
11/29	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
11/30	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
12/01	No Rating	No Rating	Storm Slabs	Wind Slabs	Persistent Slabs
12/02	No Rating	No Rating	Wind Slabs	Wind Slabs	Persistent Slabs
12/03	No Rating	No Rating	Wind Slabs	Persistent Slabs	Persistent Slabs
12/04	No Rating	No Rating	Wind Slabs	Normal Caution	Persistent Slabs
12/05	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/06	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/07	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/08	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/09	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/10	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
12/11	No Rating	No Rating	Storm Slabs	Storm Slabs	Wind Slabs
12/12	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
12/13	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/14	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/15	No Rating	No Rating	Wind Slabs	Wind Slabs	Deep Persistent Slabs
12/16	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/17	No Rating	No Rating	Storm Slabs	Persistent Slabs	Deep Persistent Slabs
12/18	No Rating	No Rating	Persistent Slabs	Persistent Slabs	Deep Persistent Slabs
12/19	No Rating	No Rating	Wind Slabs	Persistent Slabs	Deep Persistent Slabs
12/20	No Rating	No Rating	Storm Slabs	Persistent Slabs	Deep Persistent Slabs
12/21	No Rating	No Rating	Dry Loose	Wind Slabs	Wind Slabs
12/22	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
12/23	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
12/24	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
12/25	No Rating	No Rating	Storm Slabs	Wind Slabs	Wind Slabs
12/26	No Rating	No Rating	Storm Slabs	Storm Slabs	Deep Persistent Slabs
12/27	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
12/28	No Rating	No Rating	Wind Slabs	Storm Slabs	Deep Persistent Slabs
12/29	No Rating	No Rating	Wind Slabs	Wind Slabs	Deep Persistent Slabs
12/30	No Rating	No Rating	Glide Avalanches	Wind Slabs	Normal Caution
12/31	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
01/01	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
01/02	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
01/03	No Rating	No Rating	Storm Slabs	Storm Slabs	Wind Slabs
01/04	No Rating	No Rating	Storm Slabs	Storm Slabs	Wind Slabs
01/05	No Rating	No Rating	Storm Slabs	Wind Slabs	Normal Caution
01/06	No Rating	No Rating	Storm Slabs	Persistent Slabs	Normal Caution
01/07	No Rating	No Rating	Storm Slabs	Persistent Slabs	Normal Caution
01/08	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
01/09	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
01/10	No Rating	No Rating	Persistent Slabs	Wind Slabs	Storm Slabs
01/11	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
01/12	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Wind Slabs
01/13	No Rating	No Rating	Glide Avalanches	Deep Persistent Slabs	Storm Slabs
01/14	No Rating	No Rating	Glide Avalanches	Deep Persistent Slabs	Wind Slabs
01/15	No Rating	No Rating	Glide Avalanches	Wind Slabs	Wind Slabs
01/16	No Rating	No Rating	Glide Avalanches	Wind Slabs	Persistent Slabs
01/17	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
01/18	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/19	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/20	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/21	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/22	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/23	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/24	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Storm Slabs
01/25	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Storm Slabs
01/26	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/27	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Storm Slabs
01/28	No Rating	No Rating	Glide Avalanches	Persistent Slabs	Wind Slabs
01/29	No Rating	No Rating	Storm Slabs	Persistent Slabs	Wind Slabs
01/30	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
01/31	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/01	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/02	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/03	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/04	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/05	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
02/06	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
02/07	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
02/08	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
02/09	No Rating	No Rating	Persistent Slabs	Wind Slabs	Wind Slabs
02/10	No Rating	No Rating	Persistent Slabs	Wind Slabs	Wind Slabs
02/11	No Rating	No Rating	Persistent Slabs	Wind Slabs	Wind Slabs
02/12	No Rating	No Rating	Wind Slabs	Persistent Slabs	Wind Slabs
02/13	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/14	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/15	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/16	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
02/17	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/18	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/19	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/20	No Rating	No Rating	Wet Slab	Wind Slabs	Persistent Slabs
02/21	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/22	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
02/23	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/24	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
02/25	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
02/26	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/27	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
02/28	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
03/01	No Rating	No Rating	Wind Slabs	Storm Slabs	Normal Caution
03/02	No Rating	No Rating	Wind Slabs	Wind Slabs	Wind Slabs
03/03	No Rating	No Rating	Normal Caution	Wind Slabs	Storm Slabs
03/04	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
03/05	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
03/06	No Rating	No Rating	Storm Slabs	Wet Loose	Storm Slabs
03/07	No Rating	No Rating	Storm Slabs	Wet Loose	Storm Slabs
03/08	No Rating	No Rating	Storm Slabs	Wet Loose	Storm Slabs
03/09	No Rating	No Rating	Persistent Slabs	Wind Slabs	Wind Slabs
03/10	No Rating	No Rating	Wind Slabs	Normal Caution	Wind Slabs
03/11	No Rating	No Rating	Wind Slabs	Normal Caution	Wind Slabs
03/12	No Rating	No Rating	Storm Slabs	Normal Caution	Wind Slabs
03/13	No Rating	No Rating	Storm Slabs	Normal Caution	Persistent Slabs
03/14	No Rating	No Rating	Storm Slabs	Normal Caution	Wind Slabs
03/15	No Rating	No Rating	Storm Slabs	Wind Slabs	Persistent Slabs
03/16	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
03/17	No Rating	No Rating	Wind Slabs	Storm Slabs	Storm Slabs
03/18	No Rating	No Rating	Persistent Slabs	Storm Slabs	Wind Slabs
03/19	No Rating	No Rating	Wet Loose	Storm Slabs	Storm Slabs
03/20	No Rating	No Rating	Wet Loose	Storm Slabs	Wind Slabs
03/21	No Rating	No Rating	Wet Loose	Wind Slabs	Persistent Slabs
03/22	No Rating	No Rating	Wind Slabs	Storm Slabs	Persistent Slabs
03/23	No Rating	No Rating	Wind Slabs	Storm Slabs	Storm Slabs
03/24	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
03/25	No Rating	No Rating	Wind Slabs	Wind Slabs	Storm Slabs
03/26	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Storm Slabs
03/27	No Rating	No Rating	Wet Loose	Deep Persistent Slabs	Wind Slabs
03/28	No Rating	No Rating	Wet Loose	Deep Persistent Slabs	Storm Slabs
03/29	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Persistent Slabs
03/30	No Rating	No Rating	Storm Slabs	Deep Persistent Slabs	Deep Persistent Slabs
03/31	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Wind Slabs
04/01	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Wind Slabs
04/02	No Rating	No Rating	Storm Slabs	Deep Persistent Slabs	Storm Slabs
04/03	No Rating	No Rating	Storm Slabs	Wind Slabs	Persistent Slabs
04/04	No Rating	No Rating	Wind Slabs	Wind Slabs	Persistent Slabs
04/05	No Rating	No Rating	Wind Slabs	Wet Loose	Wind Slabs
04/06	No Rating	No Rating	Wind Slabs	Wet Loose	Wind Slabs
04/07	No Rating	No Rating	Wind Slabs	Deep Persistent Slabs	Wind Slabs
04/08	No Rating	No Rating	Wet Loose	Deep Persistent Slabs	Wind Slabs
04/09	No Rating	No Rating	Wind Slabs	Storm Slabs	Wind Slabs
04/10	No Rating	No Rating	Storm Slabs	Storm Slabs	Normal Caution
04/11	No Rating	No Rating	Storm Slabs	Storm Slabs	Normal Caution
04/12	No Rating	No Rating	Storm Slabs	Storm Slabs	Normal Caution
04/13	No Rating	No Rating	Persistent Slabs	Storm Slabs	Normal Caution
04/14	No Rating	No Rating	Persistent Slabs	Wind Slabs	Normal Caution
04/15	No Rating	No Rating	No Rating	Wet Loose	Wind Slabs
04/16	No Rating	No Rating	Wind Slabs	Wet Loose	Wind Slabs
04/17	No Rating	No Rating	No Rating	No Rating	Normal Caution
04/18	No Rating	No Rating	Wind Slabs	Wet Loose	No Rating
04/19	No Rating	No Rating	No Rating	No Rating	Normal Caution
04/20	No Rating	No Rating	Wet Loose	Deep Persistent Slabs	No Rating