17 Dec 2018

December 17, 2018

    YESTERDAY:

    Sunday morning, snowing at 660 meters.

    Early lift up the Blackcomb Gondola.

    Many Santa Clauses etc early Sunday morning.

    Awesome turns down Gearjammer in the morning, before the FL spiked.

    It was a festive day.

    Clumpy over on Whistler, warmer than on Blackcomb.


    Raining at the bottom of the Emerald Chair at 13:00 hrs.

    Snowing at the bottom of the Excelerator Chair same time period.

    Snowing  bottom of JC on Blackcomb at the same time period.

   Whistler at 13:00 Hrs, -0.60 Deg C 30-35 KPH from the East.

    Snowing in the valley 15:00 hrs.


Weather Observations for December 17, 2018  taken at 06:00 Hours.

2240 meters       -5, Winds were 60-95 KPH E--Horstman Hut
2180 meters       -4, Winds were 60-90 KPH S--Whistler Peak
1860 meters       -3, Winds were 40-50 KPH SE--Rendevous
1835 meters       -3, Winds were 25-55 KPH ESE--Round House
1650 meters       -1, 22 cm of new, 37 cm in 24 hrs, Base 191 cm--Pig Alley
1565 meters       -1, 22 cm of new, 36 cm in 24 hrs, Base 133 cm--Catskinner
  660 meters        0, Valley Temp, Max temp Yesterday was +0.5, 21.1 mm of precip recorded yest

   As of 07:15 Hrs this am we have broken cloud and unlimited visibility.


Maximum Temperatures Yesterday:

2240 Meters -2.1 at 17:45 hrs          1650 Meters +0.8 at 17:30 hrs   
2180 Meters -1.5 at 14:15 hrs          1550 meters +0.3 at 19:45 hrs
1860 Meters +0.2 at 11:30 hrs           660 meters +0.5 at 12:00 hrs
1835 Meters -0.3 at 18:15 hrs

FORECAST:

A few showers this am as the front moves out of our zone in a Southwest flow aloft. The FL has dropped back down to 1400-1200 meters and will hopefully hover in that zone for the day. A lull before the next frontal band reaches inland sometime this afternoon bringing strong winds and moderate/heavy precipitation tonight, slowly moving through the area into Tuesday. A short lived break on Wednesday before another strong frontal band pushes through on Wednesday night into Thursday. An upper level ridge is froecasted to build by Friday and may last until Saturday but another frontal band is approaching Saturday/Sunday. Cooler seasonable temperatures returning by Friday. Guesstimates: 25-35 cm by Tuesday morning, 20-30 cm by Wednesday morning, 10-20 cm by Thursday morning, 25-35 cm by Friday morning.

    GOES IR image from this am. A break before the next front offshore.



    Strong winds developing this afternoon. 850 Mb image represents app 1500 meters.







    Fronts along the coast, next front coming in from the Southwest


    Freezing level will hopefully fluctuate between 1400-1000 meters. Tuesday.







    Low is pulling warm air from the South, cold air beginning to push South. Wednesday.


    Deep low will send  strong winds our way for Thursday.


   AVALANCHE ACTIVITY:


    Avalanche control yesterday produced mostly Sz 1 soft slabs, a few Sz 2 storm slabs.


    INFORMATION & OBSERVATIONS:

    Avalanche closure at the top of JC yesterday.


    Dumping in Alpine Meadows in the aft at 685 meters, started raining at around 17:00 hrs..


    It snowed a lot on Sunday.


   14 cm recorded at 1565 meters from 06:00 to 14:00 hrs on the 16th. 15 cm at 1650 meters.


   Santas and Mountain Safety.


   Nice turns mid mountain at around 13:30 Hrs.


ARTICLES:

A declining number of avalanche deaths in Colorado: Colorado Sun

Prolonged draught causing dangerous avalanche conditionsAvalanche Canada

Avalanche Warning: Pacific Northwest

Avalanche control on Hwy 3: Hwy Closure Dec 16Th.

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