29 May 2020

May 29, 2020

    PAST FOUR DAYS:

    Monday May 25, 2020. 12:00 Hrs. + 12 at 660 m. + 4.5 with a 5-15 KPH breeze at 1835 m.

   Satellite image from same timeframe as above image.

    Big picture Monday at noon.


    Tuesday May 26, 2020. 15:00 Hrs. + 17.8 at 660 m. + 5.2 with a 15-30 KPH SW wind at 1835 m.

    Satellite image from same timeframe as above image.

   Tuesday afternoon.

    Wednesday May 27, 2020. 15:00 Hrs. + 21 at 660 m. + 9.7 with a 10-15 KPH W breeze at 1835 m.

    Satellite image from same timeframe as above image.


    Big picture Wednesday afternoon, impressive low!!!

    Thursday May 28, 2020. 16:00 Hrs. + 25 at 660 m. + 13.9 with a 5-10 KPH S breeze at 1835 m.

    Satellite image from same timeframe as above image.

    Thursday afternoon.


Weather Observations for May 29, 2020 taken at 06:00 Hours.

2240 meters    +7, Winds were 25-40 KPH SE--Horstman Hut
2180 meters    +8, Winds were 20-30 KPH S--Whistler Peak
1860 meters  +10, Winds were   5-15 KPH ESE --Rendezvous 
1835 meters  +10, Winds were 15-20 KPH SE--Round House
1650 meters    +8, 0 mm in 12 Hrs, 0 mm in 24 Hrs, Base 126 cm --Pig Alley
1560 meters  +10, 0 mm in 12 Hrs, 0 mm in 24 Hrs, Base 61 cm--Catskinner
  660 meters    +9, Valley Temp, Max temp Yesterday was +26.4, 0.0 mm of precip yesterday.


    As of 07:00 Hrs this am we have scattered cloud and unlimited visibility.



FORECAST:

The upper ridge will begin to weaken in a Southwesterly flow aloft. Increasing cloud cover for today with a chance of a shower this evening. The freezing level will spike at around 4000 meters for today with warm air moving in from the South. Saturday will see periods of light precipitation as the low moves down the coast and another low comes into the area from the Southeast. Could be an interesting day for some parts of the province on Saturday. Rain will continue into Sunday but we should see some weak ridging by the afternoon with unsettled weather. This pattern of sun and cloud will continue into Monday. More on that in Monday's post. Guesstimates: 0-1 mm by Saturday morning, 10-15 mm by Sunday morning, 2-5 mm by Monday morning.

    GOES IR image from this am.


    Low to the North will spill cloud into our zone today. Warm air coming from the South.





    Fronts along the coast.

     Low from the North Coast and low moving in from the South. Wet on Saturday.





      Much cooler on Sunday with some breaks by the afternoon.


    AVALANCHE ACTIVITY:

    Old debris in Whistler Bowl Tuesday afternoon.

    Blackcomb Bowl, old debris, image taken Tuesday.

    More recent activity.

    Looks like some more cornices collapsing in Blackcomb Bowl Wednesday morning.

    Overlord Glacier Wednesday, old debris but Bergschrunds and Crevasses visible.

    Different perspective of the cornices in Blackcomb Bowl.

    Thursday pm. High of + 10.3 Deg C at 2180m. No new activity here with an isothermal pack.

    May Landslide/avalanche on Yudi Peak, near Anchorage AK.. Article below. Bob Duncan Pic



    INFORMATION & OBSERVATIONS:

    After a few morning showers it did dry up with overcast skies on Monday morning.

    A few showers later in the afternoon. 5.3 mm recorded at 660 meters. Wet night.

    A few patches of blue later in the day, on Monday..

    Tuesday morning, became unsettled fairly quickly.

    Harlequin Duck<Click for info. These two were negotiating the Callaghan Creek. Good swimmers!!

    Alpen glow Tuesday evening. They have been dismantling the Horstman T-Bar.

    Blue Bird Wednesday morning.

    Fissile Wednesday afternoon.

    Clouds started moving in during the evening hours.


    Thursday morning, high overcast. Low was sending cloud our way.

    By 12:30 Hrs the warm sun was burning off the clouds quickly.

    High of + 26.4 in the valley. Clouds from above image evaporated in 15 minutes in the sun. 



VIDEOS:

Arapahoe Basin opens: 600 Lottery Spots

Prinoth Raptor 300: Road Clearing



ARTICLES:

May Landslide in Alaska: NASA

New Zealand Avalanche Dispatch: ISSUU

How COVID-19 will change the future of Backcountry Skiing: Powder

Avalanches, Part 1--The Basics: REI

Mount Hood rescuers make safety changes during outbreak: Oregon

What we actually know about Australia's 2020 Ski Season so far: SnowsBest

Long-Term Snow Water equivalent measurements: SLF

Best Aussie tours for first timers this season: SnowsBest

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