11 Apr 2020

April 11, 2020


    Nice light early Friday morning.

    Not too many clouds around in the am.

    Green Lake is continuing to break up with these warm valley temperatures..

    Some cloud began to move in.

    Might never see this again! Smooth, no tracks, no people on Good Friday.

    More cloud in the afternoon.

    High cloud was moving in from the North East.

    Friday April 10, 2020. 14:00 hrs. + 15 Deg C at 660 m. 1835 m + 5.6 Deg C, 10-20 KPH W wind

    Satellite image from same timeframe as above image.

    Big picture on Friday.

    Green Lake Breakup

    Looks like what?

    Last Light.

    Alpenglow Friday night.

Weather Observations for April 11, 2020 taken at 06:00 Hours.

2240 meters  -10, Winds were 80-130 KPH NNW--Horstman Hut
2180 meters    -9, Winds were   60-90 KPH NNW--Whistler Peak
1860 meters    -6, Winds were   55-80 KPH N --Rendezvous 
1835 meters    -6, Winds were   10-30 KPH W--Round House
1650 meters    -4, 0 cm in 12 Hrs,   0 cm in 24 Hrs, Base 250 cm --Pig Alley
1560 meters    -4, 0 mm in 12 Hrs, 0 mm in 24 Hrs, Base 170 cm--Catskinner
  660 meters   +5, Valley Temp, Max temp Yesterday was +16.2, 0.0 mm of precip yesterday.

    As of 07:00 Hrs this am we have clear skies and unlimited visibility.


Ridge continues to dominate the weather pattern in a Northerly flow aloft. Weak trough stayed East of our zone yesterday, Merritt received 2.6 mm of precipitation yesterday. More of the same for the coming week. Freezing level will climb back up to around 1500 meters today dropping back down to surface tonight. Chance of a weak trough on Tuesday with a few showers, time will tell. Enjoy the nice weather. Not much changing, chance of some showers next Saturday as well. That is a long time from now. A bit cooler today, will warm back up as the week progresses.

    GOES IR image from this am.

     High continues to affect our zone, more sun for today.

    Fronts along the coast.

     High strengthens again on Monday.

     High still looks in control on Tuesday.  


    Recent avalanche control in Stevens Pass. Click> DOT Avalanche Mitigation

    Recent avalanche in Montana. April 9, 2020. Natural Size 3 < Click for info.

    Whistler, up to Sz 2 Na wet loose later in the afternoon.

    Debris at the bottom of the Poop Chutes.

    A bit more snowballing.


    Small cloud flows over Wedge.

    Bushrat Shoulder, Bushrat, Bushwhip, and Whiplash.

    What you look-in at!! Hanging at Green Lake.

    Working overtime--Campbell-Stokes Recorder <click High yesterday was +16.2 Deg C.

    Local Submissions:

    Serac Fall Thiassi North Face in the past 48 hours.

    Looks like a Sz 3

    Temperature affected snow below 2400 meters.


Recap & Weekend Outlook: Flathead Avalanche Center

Avalanche on Mt Rainier: Justin Burrell


When Unstable Snow is the Problem--Terrain is the Solution: Powder Cloud

Incident details released in Wyoming, Idaho avalanche fatalities: Powder

RCMP will be backing up WB patrol on mountain closure: Closed means closed

Backcountry Bulletin--April 10--Earthquakes and Avalanches: Backcountry Magazine

Sea to Sky RCMP respond to Easter Weekend: RCMP

Turbulent gas clouds and respiratory pathogen emissions: Lydia Bourouiba 

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