10 Dec 2020

December 10, 2020


      Nice light early Wednesday morning.

      Clouds moved in fairly quickly.

      Sunny breaks in the am.

      Wednesday December 9, 2020. 14:00 Hrs. -3 with a 5-10 KPH South breeze. +4 in the valley.

      Satellite image from the same timeframe.

Weather Observations for December 10, 2020 taken at 06:00 Hours.

2240 meters      -9, Winds were 10-15 KPH SE--Horstman Hut
2180 meters      -8, Winds were 20-25 KPH SE--Whistler Peak
1860 meters      -7, Winds were     0-5 KPH SE --Rendezvous 
1835 meters      -6, Winds were     0-5 KPH S--Round House
1650 meters      -6, 0 cm in 12 Hrs, 2 cm in 24 Hrs, Base 98 cm --Pig Alley
1560 meters      -6, 0 cm in 12 Hrs, 2 cm in 24 Hrs, Base 62 cm--Catskinner
  660 meters      -1, Valley Temp, Max temp Yesterday was -0.2, 0.0 mm of precip yesterday.

      As of 07:15 Hrs this am we have overcast skies and unlimited visibility.


Unsettled weather this am with increasing cloud today in a Southerly-South Westerly flow aloft. May see a few flurries this afternoon and later tonight, the FL will hover around surface to 800 meters. A weak front will arrive early Friday with periods of light precipitation with an upper low moving down the coast. Upper ridging will begin Friday night into Saturday with a mix of sun and cloud. Weak front arrives early Sunday morning with light precipitation into Monday. A stronger front arrives Tuesday into Wednesday.    Guesstimates: 2-4 cm by Friday am, 2-4 cm by Saturday am, 2-4 cm by Sunday am, 10-15 cm by Monday am. 

      GOES IR image from this am.

       Mostly cloudy for Thursday. Weak upper level trough.

      Weak front from the low on the coast for Friday. Seasonable temperatures.

        Ridging on Saturday with unsettled weather and cooler temps.

     Upper ridge for Saturday with a front arriving early Sunday.


     An avalanche has killed a ski tourer at Col des Outannes, Switzerland. Article below.    Net Pic

     Limited control work on Wednesday, no results on Blackcomb, some Sz1 dry loose Xe on Whistler.

    Debris from Tuesday.

      Horstman Glacier Wednesday afternoon. Old Fracture Line.

From Sea to Sky Avalanche Bulletin:

On Tuesday, storm slab avalanches to size 2 were triggered by explosives, and evidence of an overnight natural avalanche cycle to size 2 was reported around Whistler. These dry slab avalanches entrained wet loose debris as they slid and gained mass.

A widespread natural storm slab (size 2-3) and wet avalanche (size 1-2) cycle occurred overnight Mon-Tues in the mountains north of Pemberton.

On Monday afternoon, small size 1 loose and low density slab avalanches failed naturally and with skier traffic as snow began to accumulate and load ridgetops.


      Keeners despite the conditions.

      Some blown in snow on Upper Shale Slope.

      Just for the record there are no avalanche awareness tours this year.

      Harmony Chair was turning Wednesday am.

      Wednesday afternoon 14:30 Hrs. -5 Deg C.


Red Heather: Dec 9, 2020

Hanging lake Boulder Field: Dec 9, 2020


Mountain Weather Forecast Webinar: Avalanche Canada

Powder Picker Dec 9, 2020: David Jones

7 Terrain Tricks: Greg Hill


Ski Tourer dies in an avalanche near Crans Montana: Switzerland

Climbers, If you are going into avalanche terrain, please read this: Rock & Ice

A pandemic winter foretells a backcountry skiing boom, but it's not a sport to take lightly: Seattle Times

Ski areas forced to close warn of slope dangers: Europe

5 dead in helicopter crash in France: EC 135


     Arva Canada would like to help fund raise for the wayneflanavalancheblog and are offering a silent auction of the 
     Evo 5, Spark 240 Probe, Access TS shovel and Reactor 18 Airbag with canister. Opening bid is $949 plus taxes.
     Email your offer to atmrecyclingmike@gmail.com Other ARVA products are available at this e mail.

No comments:

Post a Comment