YESTERDAY:
Sunrise was at 06:53 Hrs Tuesday am. -9 with a 32-42 KPH SE wind.Valley cloud did lift in the early afternoon. Crystal Chair.
2240 meters -9, Winds were 20-30 KPH S--Horstman Hut
1860 meters -7, Winds were 10-20 KPH SE --Rendezvous
1570 meters -7, trace in 12 Hrs, trace in 24 Hrs, Base 178 cm--Catskinner
FORECAST:
A weak stalled front will bring unsettled weather in a South Westerly flow aloft for today. The FL will likely climb to 1200 meters dropping down to around 1000 meters tonight. A mix of cloud and some sunny breaks today with possible flurries. Overcast by early Thursday morning with a wet windy warm front arriving before noon with light to moderate precipitation. The first impulse will end Thursday night with the next wave arriving early Friday morning. The FL will rise to 1500 meters on Thursday dropping slightly Friday am to around 1200 meters than back down to surface by Friday night with light to heavy precip. Saturday is looking mostly overcast with some flurries and some occasional sunny breaks. Guesstimates: 0-trace cm by Thursday am, 20-25 cm by Friday am, 25-30 cm by Saturday am, 1-4 cm by Sunday am.
AVALANCHE ACTIVITY:
Crown line above Source Lake in Washington State. Johnathan Spritzer ImageFrom Sea to Sky avalanche advisory:
Avalanche Summary
No new reports since Saturday when natural and human triggered avalanche activity quieted down but cornices continued to be reactive to explosives size 2-2.5. Minor pinwheeling was observed on steep solar aspects in the afternoon.
Snowpack Summary
20 cm of snow sits over a layer that may consist of of facets, spotty surface hoar, and/or crusts on steep solar aspects and below 1500 m. Recent wind of varying direction has blown this snow into wind slabs on a variety of aspects.
A weak layer buried in mid-February is composed of a crust, facets or spotty surface hoar depending on elevation/aspect, and is now down 50-80 cm. There have been no recent avalanches reported on this layer. Large triggers, such as an avalanche in motion, cornice fall, or intense loading from snow, wind and/or a rapid rise in temperature could awaken these deeper weak layers.
The mid and lower snowpack is well settled and strong in most areas.
INFORMATION & OBSERVATIONS:
Cornices are quite big, hence so much cornice control.FROM SEA TO SKY MIN REPORTS:
Vantage approach: March 2, 2021
Gin Peak: March 2, 2021
VIDEOS:
Avalanches caught on camera: Crazy Avalanches
Powder Picker March 2, 2021: David Jones
ARTICLES:
South Klondike Hwy hit with 'way above average snowfall', closures due to avalanches: Yukon
'Enormous' lake-crossing avalanche: Washington State
Crystal Mountain, WA limiting access after significant avalanche cycle: PNW
How has Covid influenced Backcountry Skiing: WildSnow
Roof avalanche damages a building: Big White
Submit your best avalanche photo for a pair of Goggles March 1-31, 2021. Sea to Sky Area.
Thanks to Volkl Canada for sponsoring.
No comments:
Post a comment