Turnagain Pass Archives

Date	Problem #1	Problem #2	The Bottom Line
Fri, December 24th, 2021	Wind Slabs	Deep Persistent Slabs	The avalanche danger remains CONSIDERABLE above 2500′, where it is still likely a person could trigger an avalanche 1-2′ deep on slopes that have been getting loaded by strong northwest winds since yesterday morning. Winds are expected to continue loading slopes through most of the day into the afternoon before they start to calm down. Expect to [Read More]
Thu, December 23rd, 2021	Wind Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE in areas exposed to strong northwest winds, primarily above 2500′. Human triggered avalanches 1+’ deep are likely in wind loaded areas and natural avalanches are possible. There is potential for avalanches in wind affected areas below treeline in openings in the forest, so keep an eye out for wind loading even at [Read More]
Wed, December 22nd, 2021	Wind Slabs	Deep Persistent Slabs	The avalanche danger is MODERATE on all aspects above 1,000′. Triggering a wind slab avalanche, up to 2′ thick, that formed during yesterday’s northwest winds will be possible on slopes with recent wind deposited snow. Additionally, there is still a chance a person (or smaller wind slab avalanche) could trigger a larger slab, 2 to [Read More]
Tue, December 21st, 2021	Wind Slabs	Deep Persistent Slabs	The avalanche danger is CONSIDERABLE in areas being impacted by the strong northwest winds, predominantly above 2,500′. Just after midnight, ridgetop winds increased dramatically. Any new wind slab will likely be easy to trigger by us and may release naturally. Watch for signs of recent, or active, wind loading. Otherwise, on all slopes above 1,000′, [Read More]
Mon, December 20th, 2021	Deep Persistent Slabs		The avalanche danger remains MODERATE on all aspects above 1,000′. There still exists the chance for a person to trigger a large slab that breaks in old weak layers anywhere from 2-5+’ deep. This type of large slab avalanche could be triggered from below, the side, or on top of a slope. Additionally, a few [Read More]
Sun, December 19th, 2021	Deep Persistent Slabs		The avalanche danger remains MODERATE above 1000′. It is possible a person can trigger a very large avalanche on a weak layer of sugary facets buried 2.5-5′ deep. An avalanche may be triggered after there are already multiple sets of tracks on a slope, and they may be triggered remotely from the side, above, or below [Read More]
Sat, December 18th, 2021	Deep Persistent Slabs		The avalanche danger remains MODERATE above 1000′. It is possible to trigger a very large avalanche on a layer of weak sugary snow buried 3-5′ deep. These avalanches can also be triggered remotely (from above, below, or to the sides of steeper terrain). Conservative terrain selection and awareness of steeper slopes above you is the [Read More]
Fri, December 17th, 2021	Deep Persistent Slabs	Wind Slabs	The avalanche danger is MODERATE since it is possible to trigger an avalanche 3-6′ deep on a deeply buried layer of weak, sugary facets. This layer is becoming more stubborn as we move farther out from the last major loading event, which makes it possible that a person could trigger an avalanche after there are multiple sets [Read More]
Thu, December 16th, 2021	Wind Slabs	Deep Persistent Slabs	The avalanche danger remains MODERATE at all elevations. With higher wind speeds today and light snowfall forecast to start this afternoon, triggering a 1′ deep avalanche in wind loaded areas is possible. The larger concern is a deeper layer of weak sugary snow buried 3-5′ which could create very large avalanches that are possible to be [Read More]
Wed, December 15th, 2021	Deep Persistent Slabs		The avalanche danger remains MODERATE for all aspects and elevations. Triggering a large slab avalanche, breaking in buried weak layers, is still possible. A slab like this could be 3-5′ feet deep and be triggered remotely (from below, the side, or the top of a slope). Additionally, triggering a lingering wind slab is also possible in [Read More]
Tue, December 14th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is a scary MODERATE for all aspects and elevations. Triggering either a lingering wind slab or a larger and more dangerous slab (scary) breaking in buried weak layers is possible. Wind slabs are likely to be found in exposed areas above treeline. A larger slab, which could break 3-5′ deep, could be [Read More]
Mon, December 13th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is CONSIDERABLE above 1000′ today. Human triggered avalanches 1-3′ deep are likely in areas with recent wind loading. Very large avalanches on a layer of weak sugary snow buried 3-6′ deep are also possible to be triggered by humans or smaller avalanches. Triggering one of these larger avalanches will be more likely in [Read More]
Sun, December 12th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is CONSIDERABLE above 1000′ as northwest winds continue to build sensitive wind slabs on top of a snowpack that harbors a layer of weak, sugary facets buried 4-6′ deep. A relatively small wind slab triggered near the surface can step down to create a large avalanche on that deeper weak layer. Large avalanches on [Read More]
Sat, December 11th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is CONSIDERABLE at all elevations today. Human triggered avalanches 1-3′ deep are likely especially in wind loaded areas. Winds during the last storm were out of the east but are currently blowing out of the northwest, so wind slabs could exist on a variety of aspects. Very large and destructive avalanches in a layer [Read More]
Fri, December 10th, 2021	Storm Slabs	Persistent Slabs	The avalanche danger will remain HIGH today because we received up to 2′ of new snow in the past 24 hours, with most of that falling in the last 12 hours. Large human triggered avalanches 2-4′ deep will be very likely in the new snow, especially in areas that received recent wind loading. It is likely that [Read More]
Thu, December 9th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is expected to rise to HIGH today as another round of strong wind and heavy snow picks up in the afternoon. Large natural avalanches 1-2′ deep will become likely as 30-60 mph winds build sensitive wind slabs on top of a weak foundation. It is likely that an avalanche triggered within the new snow [Read More]
Wed, December 8th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is CONSIDERABLE on all aspects above 1,000′. Human triggered wind slab avalanches (1-3+ feet deep) will be likely on any slope with recent or active wind loading. Additionally, large and dangerous slab avalanches could be triggered by people, or a smaller wind slab, in weak layers that are now buried 3 to [Read More]
Tue, December 7th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger remains HIGH due to a storm exiting currently and a round of strong wind from the northwest heading in. After 1-3′ of snowfall during the past 2 days and many natural avalanches (breaking into older weak layers), we can expect more natural avalanches today in areas with strong northwest winds. Even in [Read More]
Mon, December 6th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger is HIGH as strong winds and heavy snowfall overload a weak snowpack. Large natural and human triggered avalanches 3-6′ deep or deeper are very likely today, and will run long distances into valley bottoms. Travel in avalanche terrain is NOT recommended. This includes flat terrain below steeper slopes. *Roof Avalanches: Warm temperatures and heavy [Read More]
Sun, December 5th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger will be CONDSIDERABLE at all elevations as active weather begins to load an already dangerous snowpack. Strong winds will arrive today ahead of an approaching storm, building sensitive wind slabs that will be easily triggered by a person and will possibly release naturally. It is likely even a small wind slab around a foot [Read More]
Sat, December 4th, 2021	Persistent Slabs		The avalanche danger remains CONSIDERABLE on all aspects above 1,000′. Large dangerous avalanches could again be triggered by people today. There were several slabs triggered yesterday with one resulting in a full burial. Today will be no different. We need to travel in the mountains with a conservative mindset and approach all slopes over 30 [Read More]
Fri, December 3rd, 2021	Persistent Slabs		The avalanche danger is CONSIDERABLE today above 1000′. After seeing multiple large human-triggered avalanches yesterday, there is no question that dangerous avalanche conditions exist. The snowpack has shown us it is capable of producing avalanches hundreds of feet wide, 2-3′ deep or deeper, and being triggered remotely from above, below and adjacent to a slope. We’ve seen [Read More]
Thu, December 2nd, 2021	Persistent Slabs		The avalanche danger remains MODERATE at all elevations today. It will be possible to trigger a large avalanche on a layer of weak sugary snow buried 2-3′ deep that could release wider than expected. Triggering these avalanches from adjacent lower angle terrain or having them release above you on a slope is also possible. Careful terrain [Read More]
Wed, December 1st, 2021	Persistent Slabs		The avalanche danger is MODERATE at all elevations. Weak layers are distributed throughout the advisory area and are creating the potential for large human triggered avalanches 2-3′ deep that can release more widely than expected. Human triggered avalanches are possible and evaluating the potential for avalanche release is difficult due to the deeply buried weak layers. [Read More]
Tue, November 30th, 2021	Wind Slabs	Persistent Slabs	The avalanche danger remains CONSIDERABLE at elevations above 1,000′ due to continued stormy weather. Roughly 8 – 12″ of new snow has fallen with strong east winds, and more is on the way. Natural wind slabs and cornice falls are possible and these are likely to be triggered by people. These avalanches, or people alone, [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