Above 2,500ft Considerable
1,500 to 2,500ft Considerable
Below 1,500ft Low
Degrees of Avalanche Danger ?
Observations from Friday/Saturday were mixed, with some areas containing slabby new snow that wants to propagate with human weight. Other areas (protected from the wind) were less reactive with great riding. In general, the recent snow is starting to bond, but there remain areas of wind slab where human triggered avalanches will be likely. Avoid wind loaded areas with cohesive surface slabs.
Problem #1: Storm Snow
Location: All aspects 30 degrees and steeper, above 2,000ft. 6-12″ of new snow fell Thursday, with strong south winds. The new/old snow interface underneath is crusty/icy on sun-exposed aspects, and facetted/weak on shady north aspects. Bonding of the new snow to this old surface is fair, and slowly improving. Still, recent soft slabs (up to 60cm thick in wind-loaded areas) may propagate across slopes given the slick/crusty surface underneath. Look for signs of wind loading (drifts, rounded wind pillows, cornices, etc), and avoid these areas. If you sense hollow, slabby, or cohesive surface snow it would be a good idea to find safer, less wind-affected terrain to ride. Hand shears, small test slopes, and cautious ski cuts will be good ways to evaluate and manage this danger in the field.
Recent Avalanche Activity
Isolated natural wet-loose avalanches have been occurring over the last week, in the afternoon hours on steep, rocky South through West aspects. These slides have been mostly size 1-2 so far.
6-12″ of wet snow fell above 2,000ft Thursday (highest amounts in the Lutak Zone and lowest at the Pass). South winds were moderate-strong. Sunday will bring increasing precipitation with snow levels near 1,500ft. Rain/snow will become heavy over night into Monday, with 1.5 – 2″ of precipitation total.
|Snow Depth [in]||Last 24-hr Snow/SWE [in]||Last 3-days Snow/SWE [in]||Today’s Freezing Level [ft]||Today’s Winds||Next 24-hr Snow/SWE|
Mount Ripinsky @ treeline
|60″||1″ / 0.10||14″ / 1.10||1,500||light, S||12″/ 1.00 *|
Flower Mountain @ treeline
|42″||1″ / 0.10||12″ / 0.70||1,500||light, SE||12″/ 1.00 *|
Chilkat Pass @ 3,500ft
|20″*||1″ / 0.10 *||7″ / 0.50*||1,000||light, SE||10″/ 0.75 *|
( *star means meteorological estimate )
Additional Info & Media
If you get out on the snow, send in your observations!