24 Nov 2021

November 24, 2021

      November 22-November 23, 2021

      Fallers Rock. Monday am.


     Cold front arrived Monday afternoon.

      Snowing and blowing in the afternoon. 12 cm recorded at 1650 m Tuesday am. 

      Tuesday am. Unsettled with more sun in the afternoon. Solar warming lower elevations.

     Camel Humps.

      Later Tuesday afternoon.


Weather Observations for November 24, 2021 taken at 06:00 Hours.

2180 meters      -9, Winds were 25-35 KPH S--Whistler Peak 
1835 meters      -6, Winds were 15-25 KPH S--Round House
1650 meters      -7,   trace cm in 12 Hrs, trace cm in 24 Hrs. Base 105 cm --Pig Alley
  660 meters      -1, Valley Temp, Max temp Yesterday was +4.8, 5.4 mm of precip yesterday


      As of 06:45 Hrs we have broken cloud and unlimited visibility.



FORECAST:

An approaching front will bring light snow in a Northwest flow aloft later today. Flurries will become steady light precipitation by tonight with the freezing level rising from surface, hovering around 1000 m. The front intensifies tomorrow with moderate precipitation and the freezing level hovering in the 12-1500 m range. Some models are calling for the FL to go higher.  Friday is looking overcast with some periods of light precipitation. An atmospheric river is arriving on Saturday with wet, warm, & windy weather. Looks windy opening day as well!!

Guesstimates: 12-18 cm by Thursday am, 30-40 cm by Friday am, 2-6 cm by Saturday am. Models are different over the next few days. 




      GOES image from this am.

      2021/11/24.  13:00 Z Goes 17 image.


       Front moving down the coast today with light precipitation. 






         Front intensifies Thursday with warmer temps.





                                           AR event over the weekend.


     AVALANCHE ACTIVITY:

     Monday, Glide crack on a stiff 4 cm wind slab, NE aspect 1880 m. 



     There are winds slabs at tree line. 1800 m. Tuesday.

      Old fracture lines still visible.

      Be careful once the old frozen debris becomes covered up. 



      INFORMATION & OBSERVATIONS:

      Monday, rain runnels still obvious below 1700 m. Breakable crust with a sprinkle of new.

     Winds were strong, not sure but might have blown over this steel snow fence.

      Brief break Monday afternoon before the second wave of snow.

      Wind affected new snow Tuesday at 1890 m.

     Great coverage above 1900 m.


      Tuesday evening.





FROM LOCAL MIN REPORTS:

Paul Ridge/Round Mountain: Nov 22, 2021


VIDEOS:

What to include in your avalanche and snow observations: MWAC


ARTICLES:

Data-driven automated predictions of the avalanche danger for dry snow conditions: Switzerland

Parade of storms to resume in the Pacific Northwest: AccuWeather

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