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ARCHIVED - Forecasts expire after 24 hours.
Issued
Wed, April 23rd, 2014 - 7:00AM
Expires
Thu, April 24th, 2014 - 7:00AM
Forecaster
John Fitzgerald
Avalanche risk The Bottom Line

The avalanche danger is LOW at all elevations.   Cornice fall and very low volume wet loose avalanches are potential snowpack issues to be aware of today.

Special Announcements
  • Turnagain Pass is now CLOSED to motorized use due to low snow cover.

  • Mark your calendars!!  The 2014 Corn Harvest will be Saturday, April 26th at the Turnagain Pass Center Ridge parking lot. Come by for free food, games and fun!  More details HERE.
  • This is the final week of advisories.   They will be issued today through Sunday, April 27th.
Wed, April 23rd, 2014
Alpine
Above 2,500'
1 - Low
Avalanche risk
Treeline
1,000'-2,500'
1 - Low
Avalanche risk
Below Treeline
Below 1,000'
1 - Low
Avalanche risk
0 - No Rating
1 - Low
2 - Moderate
3 - Considerable
4 - High
5 - Extreme
Avalanche risk Avalanche risk Avalanche risk Avalanche risk Avalanche risk
Travel Advice Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features. Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern. Dangerous avalanche conditions. Dangerous avalanche conditions. Very dangerous avalanche conditions. Travel in avalanche terrain not recommended. Extraordinarily dangerous avalanche conditions. Avoid all avalanche terrain.
Likelihood of Avalanches Natural and human-triggered avalanches unlikely. Natural avalanches unlikely; human-triggered avalanches possible. Natural avalanches possible; human-triggered avalanches likely. Natural avalanches likely; human-triggered avalanches very likely. Natural and human-triggered avalanches certain.
Avalanche Size and Distribution Small avalanches in isolated areas or extreme terrain. Small avalanches in specific areas; or large avalanches in isolated areas. Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas. Large avalanches in many areas; or very large avalanches in specific areas. Very large avalanches in many areas.
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

The snowpack around the forecast area can be considered “well seasoned”.  Multiple days of no precipitation and diurnal melting and freezing have helped to strengthen the snowpack.  Despite several nights of mild air temps, the surface has been able to refreeze, mainly due to clear skies.  While avalanche activity is unlikely today, as temperatures climb and the sun hits different aspects, it is still worth being on the lookout for the following:

Cornices
These giants are fully matured and sitting above many starting zones.  Keep your distance from cornices when approaching from the side or above.  Know where the snow begins and the underlying terrain ends.  When traveling below cornices, make sure to spread your group out and minimize time spent underneath them.

Wet Loose Avalanches
In terrain over 45 degrees receiving direct sunlight and steep terrain in the lower elevations very low volume human triggered sluffs are possible.  Pay attention to any snow moving around you and get out of its way by either stopping above it or turning away from it.  It should be noted that North aspects are beginning to receive direct sun, so all aspects hold this potential.

Weather
Wed, April 23rd, 2014

Clear skies overnight have allowed for freezing to occur on the surface.   Temps (F) in the past 24 hours:

                                                                          avg.       max.
Sunburst (3,812′)                     37             42.3
Seattle (2,400′)                           37             43.7
Center Ridge (1,880′)       42             52.4

Ridgetop winds have been light and variable.   No new precipitation has fallen.

Today expect another sunny day with occasional cloud cover.   Temperatures at 1,000′ will again climb into the mid 40s F.   Winds will be out of the Southeast at 5-10 mph.

The extended outlook is showing a continuation of generally mild and sunny weather through the end of the week.

Observations
Recent Observations for Turnagain Pass
Date Region Location
11/16/23 Turnagain Observation: Tincan Common
11/14/23 Turnagain Observation: Sunburst/Magnum
11/14/23 Turnagain Observation: Seattle Ridge
11/13/23 Turnagain Avalanche: Tincan Trees
11/12/23 Turnagain Observation: Sunburst
11/12/23 Turnagain Avalanche: Goldpan – avalanche
11/11/23 Turnagain Observation: Tincan Common
11/11/23 Turnagain Observation: Taylor Pass – Sunburst
11/10/23 Turnagain Observation: Tincan
11/10/23 Turnagain Observation: Tincan Trees
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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.