9 Dec 2015

December 9, 2015


    Na (natural Avalanches) in Blackcomb Bowl Tuesday December 8, 2015.

    Snow line early Tuesday morning was near the top of the Wizard Chair.

    Snowing at 1550 meters at 08:00 Hours.

    Warm and wet by 10:30. Maximum gust at 1860 meters in the am was 98 KPH from the SSE.

    Nice to be inside when it was raining and blowing. +1 and 40-80 KPH at 11:00 Hours.

    1835 meters at 11:30 Hours, 35-100 KPH from the SSW; +3.

    A few breaks by sunset. It was relatively dry in the afternoon.


Weather Observations for December 9, 2015: taken at 06:00 Hours.

2240 meters       -4 Winds were 60-90 KPH S                --Horstman Hut Station
2180 meters       -5, Winds were 55-85 KPH SSW         --Whistler Peak
1860 meters       -4, Winds were 35-85 KPH SSE          --Rendevous
1835 meters       -3, Winds were 20-70 KPH S               --Roundhouse
1650 meters       -1,11 cm of new, 14 cm in 24 Hrs, 144 cm Base, Relative Humidity 100%  --Pig Alley
1550 meters        0,12 cm of new, 102 cm Base            --Catskinner 
  660 meters        0, Valley Temp, Max Temp Yesterday was +7.6. 18.2 mm of precip yesterday.

Maximum gust at 2240 meters yesterday was 130 KPH at 07:30 Hours. Max temp was 0 at 11:00.
Maximum gust at 2180 meters yesterday was 120 KPH at 11:00 Hours. Max temp was 0 at 11:00.

   As of 07:00 Hours this am we have obscured skies, limited visibility and it is snowing lightly.



For the forecast, a front is exiting the area this morning with strong winds. We can expect a few flurries this morning then a weak ridge will bring unsettled conditions to the area this afternoon. A vigorous frontal band will arrive tonight into tomorrow morning in a Westerly flow aloft, with the freezing level dropping from 1200 meters to the valley. Thursday will be overcast with light to moderate snowfall throughout the day. Another weak ridge builds for Friday for a mix of sun and cloud, with the FL hovering just above the valley floor. Another front arrives for Saturday with cold temps and some heavy snow slated for Saturday evening. Sunday will also have some light snow and cool temperatures. As of now a ridge builds for Monday. Guesstimates: 2-4 cm for Thursday morning, 15-20 cm by Friday morning.




    Some flurries this morning then a drying trend into this evening.

    Low pressure will bring snow to the area Thursday.

    Low is expected to slowly drift South on Thursday with ridging in its wake.

    Ridging for Friday into early Saturday morning.

   Another front for Saturday.


ARTICLES:

Helicopter transceiver search for Missing Snowmobiler unsuccessful; Revelstoke Mountaineer

Geo Spatial PDF's, CalTopo, and pre winter training: New Hampshire

Whistler's original avalanche dog inspires kid's mountain safety book: BreakingNews.ca

Atomic & Solomon launch on line snow safety curriculum: InsideOutdoors

Wet Slab Avalanches: Avalanche Canada

Arc'teryx drops into ski market with boot and airbag: GearJunkie



    Majority of precipitation was heading South by 11:00 Hours.

   Atmospheric River started drifting South by late morning.

    Lots of snow in the alpine very early Tuesday morning.

    Even a  break around 13:00 hours, the rain stopped in the afternoon.

    Valley took a bit of a beating.

    Cooled off quickly at around 16:00 Hours. -1.5 at 1860 meters. -4 by 22:00 Hours.

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