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ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Fri, March 13th, 2015 - 7:00AM
Expires
Sat, March 14th, 2015 - 7:00AM
Forecaster
Heather Thamm
Avalanche risk The Bottom Line

The avalanche danger today is LOW both in the Alpine and at Treeline. Isolated pockets of surface snow instabilities are possible in very steep and exposed terrain where consequences of a fall could be high in the wrong place. It is in this terrain where scouting your line and paying attention to surface snow variations will be important.  

Frostbite is possible today with the combination of cold temps and moderate winds. Minimize your exposure with extra layers and stop often to rewarm hands, feet, and face.

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Fri, March 13th, 2015
Alpine
Above 2,500'
Low (1)
Avalanche risk
Treeline
1,000'-2,500'
Low (1)
Avalanche risk
Below Treeline
Below 1,000'
No Rating (0)
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
No Rating (0)
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

Surface Instabilities:

It has been 5 days since our last loading event of 6-10” and 30+ mph winds. Surface snow instability has been our primary concern over the last week and we caution those getting into very steep terrain to be aware of the consequences should one find a small wind slab or trigger a sluff today.

Wind Slab

Old wind slabs 2-10” thick, both soft and hard, could be lingering on steep and complex terrain. This type of hazard is unlikely to bury a person, but could take you for a ride over a steep cliff or rocky chute. It is in these locations where being aware of the consequences of a fall should be at the forefront of your mind. It is also important to mention that surface conditions are variable and it can be difficult to see the consistency of the snow changing from soft to breakable

Loose Snow

Isolated pockets of loose dry snow can be found in steep gullies and chutes. With such cold temperatures this snow could be fast moving and knock you off your feet if it gains momentum. With good sluff management skills this is a minor concern.

LOW avalanche danger does not mean NO danger. It is important to still practice safe travel protocols. Identify safe spots, move between islands of safety one at a time, and always have an escape zone in mind.

Other hazards:

Frostbite is a legitimate concern today. As of this morning Sunburst Wx station has reached an all time season low of -8 F. Daytime highs will be near 0 F and winds are expected to be 10-20 mph from the Northwest; just cold enough to drop the wind chill to -20 F. Bring extra warm layers in order to minimize exposure to your extremities and your face. Stop to rewarm hands and feet as needed. 

 

Surface conditions vary from breakable wind stiffened snow to protected pockets of powder.    

Weather
Fri, March 13th, 2015

Yesterday skies were clear and daytime temperatures remained in the single digits F, even in the sun. Overnight lows reached -6 to -8 F along ridgetops. Winds were light 5-15 mph from the West. No new precipitation fell in the last 24 hours.

Today expect more of the same; clear skies and cold temps. Daytime temperatures will be near 0 F and ridgetop winds will be 10-20 mph from the Northwest. Near Whittier and Seward winds are expected to increase to 30-40 mph.

Cold and dry weather will last through Saturday. A large Sourtherly flow is expected to arrive in Southcentral Alaska by Sunday bringing warmer temperatures and fingers crossed, a shot of SNOW!  

PRECIPITATION 24-hour data (6am – 6am)

  Temp Avg (F) Snow (in) Water (in) Snow Depth (in)
Center Ridge (1880′)  4 0   0   43  
Summit Lake (1400′) 3   0   0   9  
Alyeska Mid (1700′) 3   0   0   27  

RIDGETOP 24-hour data (6am – 6am)

  Temp Avg (F) Wind Dir Wind Avg (mph) Wind Gust (mph)
Sunburst (3812′) -6   W    6 18  
Seattle Ridge (2400′) -4   WSW   7   20  
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Riding Areas
Updated Thu, April 01st, 2021

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
Open
No parking in turnaround at end of the road near the outhouse.
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Open
Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
Skookum Drainage
Closed
The Skookum Valley is closed to snowmachines. This closure occurs annually on April 1 as per the CNF Forest Plan.
Turnagain Pass
Open
Twentymile
Open
Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
Seward District
Carter Lake
Open
Lost Lake Trail
Open
Primrose Trail
Open
Resurrection Pass Trail
Closed
Closed for the 2020/21 winter season.
Snug Harbor
Open
South Fork Snow River Corridor
Open
Summit Lake
Open

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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.