McKay Creek Drainage

Location Name: 
McKay Creek Drainage
Region: 
BWRA
Date and time of observation: 
Mon, 02/19/2018 - 12:04
Location Map: 


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain

Observation made by: Avalanche Specialist
Snowpit Observations
More detailed information about the snowpack: 

In the BWRA we received 2-6" (12cm) of new snow. It was actively snowing all day with moderate ridge-top winds transporting the accumulations. Winds gusted in the teens from SW-W-NW directions. Wind slabs were soft with localized minor cracking & whumphing. Drifts of 12" (30cm) were found on NE-E-SE aspects just below treeline. Wind slabs & cornices had a thin "scab" on the surface & were stubborn to initiate & propagate failures with hard force. Stiff windboard existed on ridgelines & above treeline in most areas. Southern aspects are still barren.

Snowpack photos: 
12cm new
10K'
5" new
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
West
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Temperatures were in the teens & cold dry snow was falling. Near ridgelines & below treeline on leeward aspects held the majority of the new 6". Winds were blowing snow & scouring windward aspects down to bare ground.