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Turnagain Pass Avalanche Forecast RSS

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ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Sun, April 20th, 2014 - 7:00AM
Expires
Mon, April 21st, 2014 - 7:00AM
Forecaster
Wendy Wagner
The Bottom Line

The avalanche danger remains LOW in the Turnagain Pass and surrounding regions. Low volume wet loose avalanches and cornice falls are the snowpack issues to be aware of today and into the early part of this week.  

**Remember, no forecast will be issued for Monday and Tuesday. The outlook at this time is for similar avalanche concerns as today. However, the threat for larger and more dangerous wet avalanches may go up if we continue to see above freezing  ridgetop nighttime temperatures. More on this below.

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Sun, April 20th, 2014
Alpine
Above 2,500'
Low (1)
Avalanche risk
Treeline
1,000'-2,500'
Low (1)
Avalanche risk
Below Treeline
Below 1,000'
Low (1)
Avalanche risk
Alpine
Above 2,500'
Avalanche risk
Low (1)
Treeline
1,000'-2,500'
Avalanche risk
Low (1)
Below Treeline
Below 1,000'
Avalanche risk
Low (1)
Danger Scale:
No Rating (0)
Low (1)
Moderate (2)
Considerable (3)
High (4)
Extreme (5)
Avalanche Problem 1
  • Normal Caution
    Normal Caution
Normal Caution
Normal Caution means triggering an avalanche is unlikely but not impossible.
More info at Avalanche.org

It has been almost a week now since we have heard of, or seen, any ‘slab’ avalanche activity. There has been a handful of wet loose snow avalanches mainly associated with the 2-3″ of snow from Friday. Yet, the snowfall (and related sluffing) was relegated to areas close to Turnagain Arm and Portage Valley. The snowpack continues to show signs of handling the spring-time warm conditions with good stability. 

For today, and the early part of this week, our main snowpack concerns continue to be wet loose avalanches and cornice falls. Although the wind will pick up from the East, there is little to no snow available for transport and the wind will likely be just an inconvenience.

Wet Loose Avalanches:
It will be possible to trigger wet sluffs in very steep terrain with surface warming – slopes over 40 degrees, either in the lower elevations or on sunlit aspects in the higher elevations. The volume of any potential sluff will likely be low and slow moving.  

Cornices:
We have yet to see any significant cornice falls in the area. Despite this, it is still worth being aware of and staying away from them. Know where you are in relation to cornices and always hedge your bets by giving them a wide berth. Warm temperatures and sunshine will help to destabilize cornices.

Overnight Ridgetop Temperatures:
Last night was the warmest night we have seen this spring. Ridgetop temperatures remained at, or very near, 32deg (they have been dropping to the mid 20’sF until now). These warm overnight temperatures are something avalanche practitioners pay close attention to in the spring. After 3 consecutive nights where ridgetops are above freezing, the snowpack can begin to melt-down, or shed. In this case large and destructive wet avalanches, which can run to valley bottoms, become a real concern. Our snowpack this spring has undergone so much melt and freeze (remember January?) that how it will react to future warm nights is uncertain. We may simply see the pack melt out with minor wet avalanche activity, which is likely the case, but not something to bet on AT ALL as we enter into the warmer days of late April and May. Keeping an eye on the upper elevation temperature trends, cloud cover and any overnight re-freeze of the surface will be good things to watch. Additionally, being mindful of terrain above you late in the day is key in the event a large natural slide releases and runs to lower angle terrain or a drainage bottom.

Weather
Sun, April 20th, 2014

During the past 24-hours we have seen partly to mostly sunny skies and temperatures averaging ~30F. Winds have been light and variable. Overnight, temperatures have remained warm – above freezing at 2,500′ and just dipping slightly below 32F at 4,000′.

For today, we will have sunny skies with clouds streaming in from the East later in the day as a weak low pressure spins to our South. Temperatures look to climb as high as the mid 30’sF on the ridgelines and 50F at 1,000′. Winds are forecast to pick up to 25-30mph on the peaks from the East. There is a chance we could see a trace of rain below 2,000′ this afternoon and snow above this.

Looking forward to Monday and Tuesday, the high pressure over mainland Alaska looks to become more established and sunny skies with warm temperatures are in store. Our pleasant spring continues!

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Riding Areas
Updated Mon, October 26th, 2020

Status of riding areas across the Chugach NF is managed by the Glacier and Seward Ranger Districts, not avalanche center staff. Riding area information is posted as a public service to our users and updated based on snow depth and snow density to prevent resource damage at trailhead locations. Riding area questions contact: mailroom_r10_chugach@fs.fed.us

Area Status Weather & Riding Conditions
Glacier District
Johnson Pass
Closed
Placer River
Closed
Skookum Drainage
Closed
Turnagain Pass
Closed
Twentymile
Closed
Seward District
Carter Lake
Closed
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Closed
Primrose Trail
Closed
Resurrection Pass Trail
Closed
Snug Harbor
Closed
South Fork Snow River Corridor
Closed
Summit Lake
Closed

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This is a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area. This advisory does not apply to highways, railroads or operating ski areas.