May 13, 2023

     AVALANCHE ACTIVITY:

      No new avalanche activity observed on Blackcomb Friday.

      Snow will sublimate through this warm dry weather. Will be interesting to compare in a week.

      Fracture line on Lower Disease Ridge, avalanche from 2023/05/02. 

      Debris was significant from the Sz 3 Na avalanche.

      WEATHER YESTERDAY:

      Sunrise was at 05:30 Hrs Friday. +3 Deg C with a 10-15 KPH ESE wind at 1860 m.

      08:00 Hrs. +4 Deg C with a 5-10 KPH SE breeze at 1860 m.

      10:00 Hrs. +10 Deg C with a 0-10 KPH North breeze at 1860 m.

      Friday May 12, 2023. 12:00 Hrs. +10 Deg C with a 10-20 KPH ESE wind at 1835 m.

     14:00 Hrs. High at 1860 m Friday was +15.6 Deg C.

      Windy image from same timeline as above image.

      16:00 Hrs. +9 Deg C with a 25-40 KPH South, snow melting wind at 2280 m.

      21:30 Hrs. +8 Deg C with a 5-10 KPH ESE breeze at 1860 m.

Weather Observations for May 13, 2023 taken at 06:00 Hours.

2280 meters     +7, Winds were 15-25 KPH E--Horstman Hut

1860 meters     +7, Winds were 10-15 KPH N--Rendezvous  

1650 meters     +6, 0 mm in 12 Hrs, 0 mm in 24 Hrs. Base 187 cm--Pig Alley

1570 meters     +8, 0 mm in 12 Hrs, 0 mm in 24 Hrs. Base   98 cm--Catskinner

  660 meters     +5, Valley Temp, Max temp Yesterday was +24.7, 0.2 mm? of precip yesterday.

High spiked Friday at 19:45 Hrs., +11.2 Deg C at 2280 m.

      As of 06:00 Hrs we have no new precipitation, Base 187 cm at 1650 m.

     As of 07:00 Hrs we have clear skies overhead, some high scattered cloud and unlimited visibility.

FORECAST:

The ridge continues to build in a Southwesterly flow aloft gradually shifting to Easterly by Sunday. The FL is hovering around 3800 m and will rise to 4500+ meters with daytime heating. A few cirrus clouds in the mix this am will dissipate later in the am. Sunny and warm for most of the day. Warm and sunny for Sunday with well above average temperatures. Ditto for Monday. Some models are calling for precipitation Monday with the offshore low moving up the coast. Will have a different opinion on Sunday but for now going with sunny and warm. Mix of sun and some convective cloud development for Tuesday. Unsettled weather for Wednesday with a mix of sun and cloud with some showers in the pm. May experience some thunder and lightning to the east of our zone. Ditto for Thursday with an unsettled day. Dirty ridging for Friday with sunny skies for Saturday. At this time it is looking unsettled for Sunday and into Monday the last day of the winter ski season. Guesstimates: 0 mm by Sunday am, 0 mm by Monday am, 0 mm by Tuesday am,  0 mm by Wednesday am, trace-2 mm by Thursday am, 1-3 mm by Friday am.

      GOES IR IMAGE from this am.

      WINDY IMAGE 2023/05/13. 05:00 Hrs.

              Ridge of high pressure with warming temperatures on Saturday. 

      No precipitation for Saturday, some high cloud inn the mix in the am.

      Southwesterly flow aloft switching to easterly by Sunday.

        High pressure with sunny skies and warm temperatures Sunday.

      No precipitation Sunday. Dry and sunny.

        High pressure over the zone on Monday, sunny and hot.

      No precipitation on Monday.

         Offshore low will send some cloud into the zone on Tuesday, Above average temperatures.

      No precipitation on Tuesday.

      Mix of sun and cloud Wednesday with some showers in the mix.

      INFORMATION AND OBSERVATIONS:

      05:00 Hrs Friday. +3 in the valley, +2 at 2280 m. Decent crust recovery last night.

     06:00 Hrs Friday. Clouds will likely drift this way in the am. 

     Off to the Links.

      Might be a busy weekend on Green Lake.

      Will not take long for this slope to melt.

      Nice corn snow at the right time of the day.

      Two medievacs off Blackcomb on Friday. One autolaunch.

      Busy day for Blackcomb Helicopters.

      It is shiny!!! 08:45 Upload Saturday.

      Cirrus and Lenticular Clouds in the pm..

     Where there is water, there are skimmers.

      Armchair Glacier. 20:00 Hrs. 

FROM AVALANCHE CANADA:

Backcountry Avalanche Advisory – Sea to Sky

Avalanche Canada advisories are done for the season. Advisories are typically available in fall, winter and spring (October – April). Please check back in Fall 2023 for Whistler and the Sea to Sky region advisories. If you're heading into the mountains this spring, learn more about assessing spring conditions.

LOCAL MIN REPORTS:

No new Local MIN Reports as of 07:00 Hrs.

SHORT CLIPS:

Spring Avalanche on: Mt Currie, Pemberton

Nasty Ride: Very Lucky

Posted before:Crazy Footage

Waddington Range: Avalanche

ARTICLES:

Update on the Mugu avalanche rescue operation, 3 people unaccounted for: Nepal

2 Climbers who disappeared in park presumed dead "Survival is outside the window of Possibility: Alaska 

Snow Conditions Sea to Sky-May 12, 2023: ZMG

Watch a spring avalanche in Yosemite: California

Special weather statement for Whistler: May 13, 2023

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