|Signal Word||Size (D scale)||Simple Descriptor|
|Small||1||Unlikely to bury a person|
|Large||2||Can bury a person|
|Very Large||3||Can destroy a house|
|Historic||4 & 5||Can destroy part or all of a village|
Today is a day for very careful travel if you venture into the mountains. Human triggered storm slab and wind slab avalanches are likely. A mindset shift from the enjoying the fun, fluffy snow of the past few days is in order. Today the snowpack is definitely guilty until proven innocent. Even small steep slopes in the Tincan trees should be approached with caution. Yesterday was an active weather day with 1-2′ of snow falling in the mountains. Temperatures rose throughout the day creating an upside down snowpack situation as heavier snow fell on lighter snow. Easterly winds were strong and sustained gusting into the 80s and 90s for much of the day and late into the night. Observers reported cracking in the snow, triggering small avalanches and there were natural avalanches observed in Girdwood Valley. We have all the ingredients for unstable snow today. With the Solstice buried surface hoar finally having a slab over it there is also a chance avalanches may be triggered remotely. Pay attention to the terrain you are connected to as well what you are on. Look for recent avalanches, shooting cracks, drifted snow and be especially suspect of wind loaded slopes. Listen for whumpfs and hollow sounding snow. Be mindful of other groups above or below you.
Cornices: Wet snow and strong winds are the architects of cornice building. Expect cornice falls to be easy to trigger. Remember cornices can fail much farther back than expected.
Yesterday: Obscured skies with steady precipitation throughout the day and overnight. The mountains picked up over a foot of snow (1-1.5″ of water) with rain/snow line around 500′. Temperatures rose to the mid 30°Fs at sea level and low to mid 20°Fs at ridgetops. Winds were easterly and sustained 20-40 mph with gusts in the 80s and 90s (Sunburst hit 107). Winds and precipitation eased early this morning.
Today: Cloudy skies and light snow/rain showers. Rain/snow line is forecast to be around 900′ with temperatures in the high 20°Fs to low 30°Fs at ridgetops and high 30°Fs at sea level. Winds will be southerly 5-15 mph with gusts into the 20s. Temperatures will rise overnight and rain/snowline will creep up to 1500′. Winds will shift to the east and increase.
Tomorrow: Rain and snow are likely with temperatures at sea level around 40°F and high 20°Fs to low 30°Fs at ridgetops. Precipitation could be heavy at times. Winds will be easterly and moderate to strong as the next storm impacts the area. Temperatures look to decrease overnight welcoming 2020 with snow!
PRECIPITATION 24-hour data (6am – 6am)
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||31||5||0.8||41|
|Summit Lake (1400′)||32||2||0.2||13|
|Alyeska Mid (1700′)||30||14||1.16||39|
RIDGETOP 24-hour data (6am – 6am)
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||24||SE||17||44|
|04/21/21||Turnagain||Observation: Sunburst||Schauer/ Behney Forecaster|
|04/19/21||Turnagain||Avalanche: Triangle, Seattle creek||Will Morrison|
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/18/21||Turnagain||Observation: Seattle Ridge, approximately 300 yards south of the up track||Brent Byrne|
|04/17/21||Turnagain||Avalanche: Road obs||Johnston-Bloom / Moderow Forecaster|
|04/16/21||Turnagain||Avalanche: Seattle Ridge||Wendy Wagner Forecaster|
|04/16/21||Turnagain||Avalanche: Turnagain Pass, non-motorized side seen from Seattle Ridge||CNFAIC Staff Forecaster|
|04/16/21||Turnagain||Observation: Sunburst||Lance breeding|
|04/15/21||Turnagain||Observation: Tincan||Schauer/ Rothman Forecaster|
|04/13/21||Turnagain||Observation: Turnagain Pass Road Obs||A Schauer Forecaster|
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: firstname.lastname@example.org
|Area||Status||Weather & Riding Conditions|
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.