30 Nov 2020

November 30, 2020

     Saturday & Sunday:

      Awesome light Saturday morning.

      Rainbow Mountain in the Background.

      Saturday November 29, 2020. 14:30 Hrs: -5 with a 5-10 SE breeze. +3 in the valley.

      Satellite image from 14:00 Hrs Saturday.

      Ipsoot early Sunday morning.

      Fresh turns Sunday morning. Nice light until the front rolled in around noon.

      Sunday Nov 29, 2020. 14:00 Hrs. Snowing lightly. -2 with a 10-25 KPH SE wind. 0 in the valley.

     Satellite image from Sunday Pm.

      Looks promising, last two fronts were disappointingly dry.



Weather Observations for November 30, 2020 taken at 06:30 Hours.

2240 meters      -6, Winds were   65-95 KPH E--Horstman Hut
2180 meters      -6, Winds were 70-100 KPH ENE--Whistler Peak
1860 meters      -4, Winds were 25-50 KPH S --Rendezvous 
1835 meters      -4, Winds were 20-50 KPH ESE--Round House
1650 meters      -3, 17 cm in 12 Hrs, 17 cm in 24 Hrs, Base 98 cm --Pig Alley
1560 meters      -3, 9 cm in 12 Hrs, 9 cm in 24 Hrs, Base 59 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +1.1, 4.5 mm of precip yesterday.


      As of 07:15 Hrs this am we have overcast skies, variable visibility and snowing lightly.



FORECAST:

 Cold front with strong gusty winds will push through sometime this morning in a brief South Westerly flow aloft, switching to a North Westerly flow aloft. The freezing level will hover in the 1000 meter range dropping back to surface tonight. Should see unsettled weather around noon with a mix of sun and cloud as the upper trough pushes through and the ridge begins to build. Tuesday will see sunny weather and inverted temperatures as the warm ridge strengthens and dominates the pattern in the Pacific Northwest. A few days of warm sunny weather, may see some cloud and a slight chance of a shower on Thursday,  as a weak front brushes the coast, more on that in the next post. Guesstimates: 4-6 cm above 1000 m by Tuesday am. 


     GOES IR image from this am.


      Upper trough moves East, ridge begins to build. Unsettled weather by this afternoon.






      Fronts along the coast.


         High strengthens Tuesday. Just a reminder that this 850 mb image represents an elevation of 1500 m.





       High with warm air aloft for Wednesday. Note the colour in our zone.


      High pressure for Wednesday.

     AVALANCHE ACTIVITY:

     An avalanche buried a vehicle in Northern India, passengers survived. Article below.

      Local surface activity on steep slopes. Sea to Sky Forecast


    INFORMATION & OBSERVATIONS:


      Powder to the People.

      Horstman & Blackcomb Glacier MIN Report below.                                                LeeTLau Pic

      Awesome light Sunday morning.

      Front slowly advanced up the valley Sunday am.

      So True.

      Glacier travel will be challenging until we get more snow.

      It is still tiger country!!


LOCAL MIN REPORTS:

Marriott Basin East: Nov 27, 2020 

Duffy: Nov 28, 2020

Horstman Glacier: Nov 28, 2020 

Rainbow Mountain: Nov 28, 2020


VIDEOS:

Leaving the ski area boundary puts you in the backcountry: Avalanche Canada

How to do a Pre-Season Gear Check: Avalanche Guys


ARTICLES:

An avalanche buried a vehicle on Zojila Pass, passengers escaped: Northern India

Mountain Conditions, Nov 27, 2020: Powder Cloud

How the pandemic has changed Backcountry Safety: Outside

Natural, human-triggered avalanches reported across: Colorado

Beaver Full Moon Eclipse, Nov 30, 2020: Space.com

Avalanche Safety a growing priority for clubs: Ski Racing

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