15 Mar 2019

March 15, 2019


    Very light snow Thursday morning.

    Decent visibility in the valley in the am.

    Mid Mountain cloud.

    Snow was soft on the glacier.

    Cloud moved around all day.

    Raining in the valley at the end of the day.

    Snow line was just below 1000 meters.

Weather Observations for March 15, 2019, 2019 taken at 06:00 Hours.

2240 meters       -7, Winds were 25-30 KPH E--Horstman Hut
2180 meters       -6, Winds were 20-25 KPH SW--Whistler Peak
1860 meters       -4, Winds were 10-20 KPH SE--Rendevous
1835 meters       -4, Winds were  10-20 KPH E--Round House
1650 meters       -3, 3 cm of new, 4 cm in 24 hrs, Base 258 cm--Pig Alley
1565 meters       -3, 2 cm of new, 3 cm in 24 hrs, Base 188 cm--Catskinner
  660 meters        0, Valley Temp, Max temp Yesterday was +4.0, 0.3 mm of precip recorded yest

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


A weak frontal band will bring mostly overcast conditions today as the warm ridge continues to build, we are in a Westerly flow aloft. The FL will rise to just below 1500 meters and drop back down tonight to around 900 meters. We may see a few breaks this am and in the afternoon. The air mass is dry but we may see a few isolated flurries. Unsettled weather for Saturday with a mix of sun and cloud. Ridging on Sunday with the FL rising too 2300 meters.. Ridge strengthens on Monday with sunny warm weather, the FL will likely top out at around 3200+ meters. A mixed bag next week with mostly sunny weather and some developing cloud. Long range- possible front arriving for next Saturday. Guesstimates: 0 precipitation for at least a week.

    GOES IR image from this am.

    Unsettled today as the strong low to our North sends a weak upper trough.

    Fronts along the coast.

    Low and high still battling it out, unsettled weather for Saturday.

    Warm ridge starts deflecting the low for sunny skies on Sunday.

    Ridge strengthens on Monday.


    An avalanche North of Haines, Alaska has killed a snowboarder. Article below.            Net Pic     

    Locally, Sa Sz 1 in lakeside Bowl yesterday. Sz 1.5 Sc with cornice work. Otherwise no new.


    Cornices continue to grow and may be an issue as it warms up.

   Trace on the boards at noon. 1 cm recorded at 14:00 Hrs.

    Catskinner weather plot.

    Horstman Glacier.

From Avalanche Canada MIN Reports:

Decker-Trorey: March 13, 2019

Circle East: March 14, 2019

Mark Grist
District Avalanche Assistant
BC Ministry of Transportation and Infrastructure
North Cascades Avalanche Program

Thanks as always for your excellent work on the avalanche blog.

I’m wondering if you could help us with a PSA regarding recreationists, glide avalanches, rock slabs and the Coquihalla.

I just posted to the MIN with some photos… people were skiing this feature (highly visible from the road) last week… and it released full depth this week.

The problem as I see it is twofold:

1)      Relative lack of awareness amongst recreationists regarding glide avalanche phenomena… which is understandable – they’re relatively rare, and, it isn’t even listed as an avalanche character when making MIN submissions.
2)      Lack of awareness of how widespread the smooth granite rock slabs are in the Coquihalla zone.

Thanks again for all your hard work educating the public and professionals alike.


Avalanche Mitigation: Berthoud Pass

Avalanche Control: Red Mountain Pass


A snow boarder has died in an avalanche North of Haines: Alaska

Avalanches in Canada--A look at the types, sizes and safety tips: Global News

Student research helps improve tree well safety: E-Know

Powder addiction is luring skiers off piste: Bloomberg

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