Turnagain Pass Archives

Date	Problem #1	Problem #2	The Bottom Line
Thu, December 26th, 2019	Wind Slabs	Glide Avalanches	The avalanche danger is CONSIDERABLE in the Alpine and Treeline today. Human triggered wind slabs are likely in steep leeward terrain and natural avalanches are possible as wind-loading continues today. Careful route-finding is advised. Look for signs of instability and steer clear of cornices and glide cracks. Below Treeline there is the concern that a [Read More]
Wed, December 25th, 2019	Wind Slabs	Glide Avalanches	A MODERATE avalanche danger exists above 1000′ and LOW danger below treeline. As winds transport snow today, it’s possible for a human to trigger wind slabs on steep leeward slopes and cross-loaded gullies. Give cornices and glide cracks a wide berth. *The National Weather Service has issued a Winter Weather Advisory beginning at noon today for [Read More]
Tue, December 24th, 2019	Wind Slabs	Glide Avalanches	The avalanche danger remains MODERATE above 1,000′. Human triggered wind slab avalanches are possible on slopes over 30 degrees with wind deposited snow. These are likely to be 4-12″ thick and could be more touchy than expected. Additionally, very shallow soft storm slabs (4-8″ thick) may be found in areas out of the wind and [Read More]
Mon, December 23rd, 2019	Wind Slabs	Glide Avalanches	The avalanche danger is MODERATE in the Alpine. Triggering small, tender wind slabs on steep leeward slopes and cross-loaded gullies is possible today. Watch your sluff in steep protected terrain and give cornices and glide cracks a wide berth. [Read More]
Sun, December 22nd, 2019	Persistent Slabs		The avalanche danger will be LOW today and is expected to rise to MODERATE tonight in the Alpine as new snow and wind impacts the forecast area. Ridgetop winds are expected to increase and transport snow this afternoon, which may begin to form small fresh wind slabs in leeward terrain. Until then, watch for lingering [Read More]
Sat, December 21st, 2019	Persistent Slabs		A MODERATE avalanche danger exists in the high Alpine (above 3,000′) and in the periphery of our forecast zone, such as Crow Pass and the far southern end of Turnagain Pass extending to Summit Lake. Although trending to unlikely, a chance may still remain for a person to trigger a large avalanche breaking near the [Read More]
Fri, December 20th, 2019	Wind Slabs	Persistent Slabs	A MODERATE avalanche danger exists above 2500′ for lingering wind slab avalanches in steep wind-loaded terrain and cornice falls. Triggering a wind slab 1-3′ thick on an unsupported slope or cross-loaded gully is still possible. Give cornices and glide cracks a wide berth. Keep the chance of triggering a persistent slab avalanche in high elevation terrain [Read More]
Thu, December 19th, 2019	Wind Slabs	Persistent Slabs	A MODERATE avalanche danger exists above 2,500′ for wind slab avalanches and cornice falls. Triggering a lingering wind slab 1-3′ thick is possible in steep terrain just off ridgelines and in cross-loaded gullies. Give cornices a wide berth. They have grown and may break off easily. [Read More]
Wed, December 18th, 2019	Wind Slabs	Glide Avalanches	A MODERATE avalanche danger exists in the Alpine above 2,500′ for wind slab avalanches and cornice falls. Watch for fresh or lingering wind slabs from 1-3′ thick that may be possible to trigger just off ridgelines and in cross-loaded gullies. Cornices have grown and could break off easily- they deserve a wide berth. [Read More]
Tue, December 17th, 2019	Wind Slabs	Glide Avalanches	The avalanche danger is MODERATE in the treeline and alpine today on steep wind loaded slopes, where human triggered avalanches remain possible. Wind slabs and older storm slabs anywhere from 1 – 3′ may still be touchy after the past week of new snow and consistent winds. A chance for glide avalanches remains in the treeline [Read More]
Mon, December 16th, 2019	Wind Slabs	Glide Avalanches	The avalanche danger is MODERATE above 1000′. Human triggered wind slabs and cornice falls remain possible on steep leeward slopes and gullies. Look for signs of obvious wind effect and choose terrain carefully. ***There is virtually no snow below 1000′. However, there have been a two reported natural avalanches since Friday that have run from [Read More]
Sun, December 15th, 2019	Wind Slabs	Glide Avalanches	Today the avalanche danger is CONSIDERABLE in the Alpine where 1-3′ of snow has fallen over the last two days. The primary concern is wind slab and cornice development in the lee of ridges and gullies where snow is likely being transported by recent winds ranging from 10-40 mph. Stay alert for signs of instability. [Read More]
Sat, December 14th, 2019	Glide Avalanches	Wind Slabs	The avalanche danger remains CONSIDERABLE above 1,000′. At the mid-elevations, glide avalanches continue to release. Avoid being under any crack forming in the snowpack as these are very unpredictable avalanches that release spontaneously. At the high elevations, new snow and strong wind over the last two days have created storm snow avalanche issues. This includes [Read More]
Fri, December 13th, 2019	Glide Avalanches	Wind Slabs	The avalanche danger is CONSIDERABLE above 1,000′ for a variety of avalanche problems. At the mid-elevations, glide cracks are opening and releasing into avalanches currently. Avoid being under any crack forming in the snowpack as these are very unpredictable avalanches. At the high elevations, new snow and strong wind are keeping the potential for wind [Read More]
Thu, December 12th, 2019	Wind Slabs	Persistent Slabs	Today, above 2500′ the danger is CONSIDERABLE where natural avalanches are possible and human triggered avalanches are likely. East winds persist and snow continues to accumulate above 3000′ creating wind slabs and growing cornices throughout the region. The persistent warm temperatures are making the snowpack thin up to 2500′. It’s a great day to tune [Read More]
Wed, December 11th, 2019	Wind Slabs	Persistent Slabs	Another round of strong wind and several inches of new snow will keep the avalanche danger above 2,500′ CONSIDERABLE. Natural avalanches are possible, especially in the Portage Valley where the majority of precipitation is expected. Human triggered wind slab avalanches and cornice falls are likely region-wide as winds continue to load high elevation leeward slopes. [Read More]
Tue, December 10th, 2019	Storm Slabs	Persistent Slabs	The avalanche danger above 2500′ is CONSIDERABLE. Human triggered avalanches are likely and naturals are still possible. The Alpine received heavy snow with strong winds yesterday and the snowpack needs time to adjust. Below 2500′ where most of the precipitation fell as rain the danger is MODERATE. There is no snow below 1000′ and NO [Read More]
Mon, December 9th, 2019	Storm Slabs	Persistent Slabs	Due to strong winds, heavy snow and rain the avalanche danger is HIGH at all elevation bands. Natural avalanches are likely. Travel in avalanche terrain is not recommended. This includes low elevation terrain that is in the runout of slopes above. *Today is not the day to hike Byron Glacier trail. [Read More]
Sun, December 8th, 2019	Storm Slabs	Persistent Slabs	The avalanche danger remains CONSIDERABLE above 2,500′ in the Alpine. Slab avalanches, between 8 inches to 2 feet thick and composed of yesterday’s new snow, are likely to be triggered on upper elevation slopes. Additionally, newly formed cornices may break off easily. New snow amounts vary and areas with little new snow have a MODERATE [Read More]
Sat, December 7th, 2019	Storm Slabs	Persistent Slabs	The avalanche danger will rise to CONSIDERABLE above 1,000′ today as a warm storm brings up to a foot of new snow with strong ridgetop winds. Another 5-8″ of snow is expected tonight. Natural avalanches composed of the new snow are possible, such as wind slabs, storm slabs and cornice falls, and human triggered avalanches [Read More]
Fri, December 6th, 2019	Persistent Slabs		The avalanche danger remains MODERATE in the Alpine due to a buried layer of faceted snow that sits 2-3′ below the snow surface. This layer is still showing signs that an avalanche could be triggered on steep slopes at the high elevations above 3,000′. Below 3,000′ there is a LOW avalanche danger. *Avalanche danger expected [Read More]
Thu, December 5th, 2019	Persistent Slabs	Wind Slabs	A MODERATE avalanche danger exists above 2,500′. Triggering a large, dangerous avalanche remains possible due to a suspect weak layer/ bed surface combination near the ground. In addition, be on the lookout for lingering small wind slabs particularly along or just below leeward ridges. [Read More]
Wed, December 4th, 2019	Persistent Slabs	Wind Slabs	A MODERATE avalanche danger exists above 2,500′. Triggering a large, dangerous avalanche remains possible due to a suspect weak layer/ bed surface combination near the ground. In addition, be on the lookout for lingering small wind slabs particularly along or just below leeward ridges. [Read More]
Tue, December 3rd, 2019	Wind Slabs	Persistent Slabs	A MODERATE avalanche danger exists in the Turnagain Pass region above 2,500′. Small wind slabs will be possible to trigger in higher elevation terrain, particularly along or just below leeward ridges. Furthermore, a suspect weak layer/ bed surface combo exists above 3,000’ where triggering a much larger, more dangerous avalanche remains possible. [Read More]
Mon, December 2nd, 2019	Wind Slabs	Persistent Slabs	A MODERATE avalanche danger exists in the Turnagain Pass region above 2,500′. Triggering a small fresh wind slab along the higher ridgelines is possible today. Additionally, it may be possible to trigger a much larger avalanche above 3,000′ due to a suspected weak layer 1-3 feet below the snow surface. [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