Issued: Mon, Apr 23, 2018 at 8AM

Expires: Mon, Apr 23, 2018

Above 2,500ft Considerable

1,500 to 2,500ft Considerable

Below 1,500ft Low

Degrees of Avalanche Danger ?

1. Low
2. Moderate
3. Considerable
4. High
5. Extreme

Avalanche Danger Rose ?

Avalanche Problems ?

Problem Details

Human triggered avalanches will be likely today, with natural avalanches possible in wind loaded terrain.

Problem #1: Storm Snow

Location: All aspects 30 degrees and steeper, above 2,000ft. 7-16″ of new snow fell Sunday night, with strong south winds. Moderate snowfall rates will continue today. Expect tender fresh wind slabs within the new storm snow.  The new/old snow interface (30-60cm deep) 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 70cm 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.

Recent Weather

7-16″ of wet snow fell above 2,000ft Last night (highest amounts in the Lutak Zone and lowest at the Pass). South winds were moderate-strong. Rain/snow will continue Monday, with an additional .50″ of precipitation likely. 

 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
76″ 16″ / 1.40 16″ / 1.40 2,500 mod, S 6″/ 0.50 *
Flower Mountain @ treeline
 49″ 7″ / 0.80 7″ / 0.80 2,500 mod, SE 4″/ 0.40 *
Chilkat Pass @ 3,500ft
 27″* 7″ / 0.80 * 7″ / 0.80 * 2,000 mod, SE 4″/ 0.40 *

( *star means meteorological estimate )

Additional Info & Media

If you get out on the snow, send in your observations!

Posted in Transitional Zone Forecasts.
Erik Stevens

Forecaster: Erik Stevens