AST 1 Course - Bald Hills
Avalanchesprockter · Feb 28, 2021 · Maligne
Weather
- Max Temp
- 1
- Min Temp
- -8
- Wind Speed
- windSpeedLight
- Blowing Snow
- light
- Sky Condition
- brokenClouds
- Wind Direction
- SE
- New Snow24 Hours
- 7
- Storm Start Date
- 2021-02-28
- Precipitation Type
- snow
5-10cm low density HST fell early this AM with little observed wind affect. This was more snow than anticipated and a small loose dry/wet avalanche cycle occurred in the AFT once the sun came out. We also noted less wind than anticipated in the area with just L, SE winds blowing in the morning. Little to no blowing snow was observed in the ALP; however, we had limited obs today. Temperatures remained below zero with a high of -1C in the parking lot at 1700.
Snowpack
- Depth
- 120
- Obs Type
- point
- Site Aspect
- N
- Test Fracture
- sudden
- Test Initiation
- moderate
- Test Failure Depth
- 32
- Site Elevation Band
- tln
- Surface Conditions
- newSnow
- Test Failure Layer Crystal Types
- facets
5-10cm low density HST sits atop 25cm of previous HST from last week. This overlies facets to 70cm and DH to ground. HS 120cm @ TL and generally supportive unless stepping over heat sinks. Snowpack unsupportive on snowshoes at BTL. TP @ 2150m on 35 deg. N-facing slope: CTM13 (SP) down 32 on FC ECTN13 down 32 on FC ECTN26 down 70 on DH 6-9mm Slope tests produced hard shear results on DH layer. No other signs of instabilities observed in the field.
Avalanche
- Trigger Type
- natural
- Avalanche Size
- 1
- Start Zone Aspect
- S, SW, W
- Avalanche Character
- looseWet, looseDry
- Number Of Avalanches
- 11-50
- Avalanche Observation
- 12hrsAgo
- Weak Layer Crystal Type
- stormSnow
- Start Zone Elevation Band
- tln, btl
- Avalanche Occurrence Datetime
- 2021-02-28T22:00:00.000Z
Small LW/LD cycle occurred this afternoon in the Maligne Valley, most notably along the Maligne Lake Road at Medicine Lake (none reaching the road). AirT @ 1800 was +1C at the lake. Also noted a few LD avalanches at TL. All size 1, triggered by solar radiation, and from the 5-10cm of snow that fell this AM. No slab avalanche activity observed today.