YESTERDAY:
Sunrise Friday was at 07:01 Hrs, -4 with a 10-20 KPH SW wind.2240 meters -6, Winds were 20-25 KPH SW--Horstman Hut
1860 meters -4, Winds were 10-15 KPH ESE --Rendezvous
1570 meters -2, 0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 193 cm--Catskinner
FORECAST:
Upper level ridge has dampened with overcast skies for this am in a Northerly flow aloft. A vigorous front arrives this afternoon with strong winds and light/moderate precipitation. The FL will likely stay below 1500 meters dropping to 1000 meters by tonight. Another impulse of moderate precip with strong winds (100+) on Sunday with the FL dropping to surface later in the day. Should see a drying trend Sunday night with the ridge rebuilding for Monday with sunny skies. Tuesday and Wednesday look nice with a mix of sun and cloud. Next weak front arrives on Thursday. Guesstimates: 18-22 cm by Sunday am, 18-22 cm by Monday am.
AVALANCHE ACTIVITY:
No new avalanches observed on Whistler. Xc results up to Sz 3. Cornice drops.Cornice control on Exlax. Xc up to Sz 2.5 on other cornice blasts. No new avalanches observed.
From Sea to Sky Avalanche Advisory:
Avalanche Summary
A few cornices were triggered naturally and from explosives on Tuesday, Wednesday and Thursday. They were very large, as is expected at this time of year. On Thursday there was also a size 2 wind slab reported on a north aspect at 1900 m.
Snowpack Summary
Snow accumulated earlier in the week with strong wind from the southwest switching to northeast. New wind slabs likely formed during this time, which may linger in steep, alpine terrain features. This snow adds to the 30+ cm that accumulated on the weekend. All of the new snow sits above a widespread crust, with the exception of high north-facing terrain. Observations suggest the snow has bonded well to the old snow beneath.
Remember that cornices along ridgelines are large at this time of year and always have the possibility of failing naturally or from the weight of a human.
INFORMATION & OBSERVATIONS:
Just a reminder, will be challenging when it snows.FROM SEA TO SKY MIN REPORTS:
Pauls Ridge: March 26, 2021
Brandywine Surface Hoar & More: March 26, 2021
VIDEOS:
New Snow, Wind & Sun=Avalanches Possible: Montana
Melt Freeze Snow: Cycle
Powder Picker March 26, 2021: David Jones
ARTICLES:
Daily Melt-Freeze Cycles: Spring Conditions
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