Check for pockets of wind slab around steep and high-consequence features.
Easterly winds Monday could build fresh slabs in less common areas. Watch for reactive pockets where wind creates stiffer and deeper deposits.
Sunday night: Blustery with alpine flurries, up to 10 cm with higher amounts near Waterton NP and the US border. Increasing east wind. Ridgetop low -14 C.
Monday: Unsettled and convective. Gusty and increasing east-northeast wind. Ridgetop high -8 C.
Tuesday: Cloudy with isolated flurries. Moderate to strong east wind. Ridgetop high -10 C.
Wednesday: Mostly cloudy with sunny breaks. Light east wind. Ridgetop high -8 C.
On Saturday, small slab avalanches to size 1.5 were reactive to skiers and explosives, especially near ridgetop lee features.
A few wet loose avalanches were reported on Thursday and Friday, several from steep, rocky, solar terrain.
Spring conditions have left a crust covered and deteriorating snowpack below 1600 m. At upper elevations, 5-20 cm recent and settling snow covers a crust on all aspects except high north terrain.
Multiple crusts exist in the upper snowpack. The mid and lower snowpack are generally strong and well bonded.
