February 10, 2023

       AVALANCHE ACTIVITY:

      There are videos below of the Chocolate Bowl Close Call. 2023/02/08.Click>  MIN Report

      Fracture Line Profile of the above avalanche.

      An avalanche on Brohm Ridge with a awesome outcome. Article below. Pique Magazine. Net Pic

      No avalanche mitigation with explosives Thursday. Some Sc Sz 1 storm slabs on Blackcomb. 

      Cornice control on Flute Thursday, on Whistler. Some Sz 1 Sc storm slabs.

      Sz 2.5 Xc on SA Flute. Watch for the debris in whiteouts and snow fall.

      WEATHER YESTERDAY:

      Sunrise Thursday was at  07:34 Hrs. -3 Deg C with a 10-20 KPH ESE wind at 1835 m. S-1

     10:00 Hrs. -2 Deg C with a 15-20 KPH ESE wind at 1835 m. S 1.5 cm/hr.

      Thursday February 9, 2023. 12:00 Hrs. -2 Deg C with a 15-60 KPH SE wind at 1835 m.

      14:00 Hrs. -1 Deg C with a 0-5 KPH North wind at 1835 m.

      16:00 Hrs. -1 Deg C with a 15-40 KPH South wind at 1835 m.     Spike of 0 Deg C at 13:45 Hrs

Weather Observations for February 10, 2023 taken at 06:00 Hours.

2280 meters     -8, Winds were 85-120 KPH SSW--Horstman Hut

2180 meters     -6, Winds were 70-100 KPH ESE--Whistler Peak

1860 meters     -5, Winds were   35-60 KPH S--Rendezvous  

1835 meters     -5, Winds were   20-40 KPH SE--Round House

1650 meters     -3, 16 cm in 12 Hrs, 20 cm in 24 Hrs. Base 221 cm--Pig Alley

1570 meters     -3, 16 cm in 12 Hrs, 21 cm in 24 Hrs. Base 150 cm--Catskinner

  660 meters    +2, Valley Temp, Max temp Yesterday was +1.7, 7.3 mm of precip yesterday.

       As of 06:00 Hrs this am we have 16 cm of new snow. 13 mm in precip gauge. Base  221 cm.

       As of 07:00 Hrs we have overcast skies, variable visibility and it is snowing lightly.

FORECAST:

An upper trough will bring periods of light precipitation this am in a Southerly flow aloft. Dries out in the pm with a mix of sun and cloud. The FL is hovering around 1000 m and has the potential to reach 1400 m Friday afternoon, may only go up to 1200 m. Dirty ridging with clouds spilling over the high with overcast skies and isolated intermittent flurries for Saturday. Above average temps. Frontal band arrives Sunday around sunrise with light precipitation through the day. Front continues into early Monday, eases by mid am with overcast skies and periods of flurries, below average temps. Ridge of high pressure develops Tuesday with sunny skies. Sunny breaks Wednesday am with cloud moving in by the pm with overcast skies and flurries. Guesstimates: 1-4 cm by Saturday am, 0-trace by Sunday am, 10-15 cm by Monday am, 2-5 cm by Tuesday am, 0 cm by Wednesday am, 0-1 cm by Thursday am,  

      GOES IR  IMAGE from this am.

      WINDY IMAGE 2023/02/10. 05:00 Hrs.

       Upper trough with light precipitation in the am, unsettled in the pm. Above average temps.

      Periods of light precipitation in the am. Dries out in the pm.

      Southerly flow aloft.

       Weak dirty ridge with the high and low battling above the zone. Above average temps.

      Most of the moisture is North Saturday. Overcast with chance of intermittent flurries.

       Frontal band Sunday with light precipitation, above average temps.

       Light precipitation on Sunday.

        Weak trough with periods of light precipitation, cooler Northerly flow.

      Periods of light precipitation Monday. Snow to the valley.

      Ridging Tuesday with sunny skies, below average temperatures.

      Sunny periods Wednesday am, overcast in the pm with flurries.

      INFORMATION & OBSERVATIONS:

      Snowing lightly (moist)  at 660m at 08:00 Hrs.

      Snowing in the valley 10:15 Hrs.

      Snowing 1.5 cm per hour in the am.

       Stopped snowing around noon with some unsettled weather.

      Lower Disease Ridge

      Awesome skinny lenticular clouds. Next frontal band is on the way!

      Blowing snow on Flute.

      Cornice noses were growing! Nc cornice tabs were releasing.

      It was an awesome afternoon.

      Unsettled at 15:30 Hrs.

     Glide Roof Avalanche with Teeth!!

       Profile from 2023/02/02. Brandywine Ridge. SW Aspect.

      As of 14:30 Hrs at 1570 m 5 cm of new snow recorded since 06:30 Hrs. Base 139 cm.

FROM AVALANCHE CANADA:

Travel and Terrain Advice

Use increased caution at all elevations. Storm snow is forming touchy slabs.

Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Be especially cautious as you transition into wind affected terrain.

HIGH--Please read Sea to Sky Advisory, top right of sidebar.

LOCAL MIN REPORTS:

Winter Camping School Trip: Feb 9, 2023

SHORT CLIPS:

Sled outrunning avalanche: Chocolate Bowl

POV of sledder outrunning avalanche: Chocolate Bowl

Avalanche Control: Mt Hood Meadows

HooDoo Chutes: Cool Colours

Lowest Windchill : -109 US ?

Deep Pow Turns: Sledding

ARTICLES:

Two rescued after swept away by an avalanche in Gurez: Kashmir

With avalanche risk High, be safe in the backcountry: Clearwater Times

Series of Sea to Sky Avalanches lead to multiple close calls: Pique

The Real story about the avalanche that killed 2 in Gulmarg: Kashmir

An extreme dry-slab avalanche  case on Mt Nodanishoji, Japan: January 2021

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