Wayne Flann Avalanche Blog: December 7, 2020

YESTERDAY:

There were even a few breaks Sunday am.

A few different cloud layers.

Moisture lifted as the day progressed.

Sunday December 6, 2020. 14:00 Hrs. -1 with a 20-35 KPH SE wind. +5 in the valley.

Satellite image from the same timeframe.

Next frontal band working its way down the coast. Looks likes an atmospheric river event.

Weather Observations for December 7, 2020 taken at 06:00 Hours.

2240 meters -3, Winds were 80-105 KPH SE--Horstman Hut

2180 meters -3, Winds were 60-90 KPH S--Whistler Peak
1860 meters -1, Winds were 25-55 KPH S --Rendezvous

1835 meters -1, Winds were 20-45 KPH SE--Round House

1650 meters +1, 4 cm in 12 Hrs, 4 cm in 24 Hrs, Base 90 cm --Pig Alley
1560 meters -1, 2 cm in 12 Hrs, 2 cm in 24 Hrs, Base 50 cm--Catskinner

660 meters +4, Valley Temp, Max temp Yesterday was +5.6, 0.5 mm of precip yesterday.

As of 07:00 Hrs this am we have obscured skies, limited visibility and snowing.

FORECAST:

A wet warm windy front will bring light to moderate precipitation today in a South Westerly flow aloft. The freezing level will likely spike this afternoon with a range between 1600-2500 meters. We may get lucky and it may hover in the 2000 meter range!! Heavy precipitation early Tuesday morning will slowly ease to light precipitation by the afternoon with drier weather expected Tuesday night. The FL should drop down to around 1000 m. A short wave trough arrives for Wednesday but should dry out by the afternoon with the possibility of some sunny breaks. A more seasonable weak front arrives on Thursday. Guesstimates: 30-45 cm above 2000 meters by Tuesday am, 2-6 cm above 1000 meters by Wednesday am, trace-1 cm above 800 meters by Thursday am.

GOES IR image from this am.

Large low in the Allutiens will send a wet warm front our way today.

Dries out by Tuesday afternoon with cooler temperatures.

Looking drier on Wednesday with cooler temps.

AVALANCHE ACTIVITY:

From Sea to Sky Avalanche Advisory:

Outside of a few small loose-wet avalanches from steep terrain, there have been no avalanche observations since last Wednesday (Dec 2) when natural widespread wet loose avalanche cycle up to size 3 was triggered by warming.