Avalanche Forecast
Issued: Feb 20th, 2020 4:40PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Cornices.
marcus waring,
Parks Canada
The SW winds have returned spreading the windslab problem throughout Waterton Park. Enjoy the excellent travel conditions while avoiding heavily wind loaded pockets.
Summary
Weather Forecast
Friday: Mostly Sunny. Freezing level at valley bottom. SW wind 60km/h gusting to 90.
Saturday: Mostly Sunny. Freezing level 1500m. Strong SW wind with extreme gusts.
Sunday: A mix of sun and cloud with isolated flurries. Freezing level at valley bottom. Strong SW wind with extreme gusts.
Snowpack Summary
A sun crust is developing on solar aspects. In lee areas, multiple layers of windslab sit over the Feb 1st melt freeze crust which exists up to approx 2100m. Reactivity of this windslab is extremely variable. Expect windslabs to become more sensitive as temperature rises. The midpack is strong, though weaker basal facets can be found in thin areas.
Avalanche Summary
One size 2 natural windslab avalanche occurred on a E aspect at cameron lake between Monday afternoon and Thursday AM.
Continued cornice growth in the alpine.
Confidence
Problems
Wind Slabs
Strong winds over the next three days will amplify this problem in specific locations.
- Caution on open steep slopes at treeline and above that have been exposed to wind loading.
- If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.
Aspects: North, North East, East, South East, South, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
- Give cornices a wide berth when travelling on or below ridges.
- Cornices become weak with daytime heating.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Feb 23rd, 2020 4:00PM
