Details

• Date: 2018/02/23

• Observer: Ian HAVLICK
• Organization: CBAC

Location

• Operation: CB Avalanche Center
• Area Description: West facing slopes above Pittsburg, Gothic Mountain Tour course. BTL, NTL. SW, W facing terrain

Weather

• Weather Description: Mostly cloudy, light to moderate SE-S-SW winds. Temps in the 15-20ºF. minimal new snow accumulation during day, but ~3-4" overnight

Snowpack

• Snowpack Description: HS 60-120cm. in west facing BTL and NTL terrain, developing 1F mid pack, with still concerning structure and basal facets. Eroding melt freeze crusts 60cm deep (1/2 way down pack). ECTX on BTL, 34º slope (on race course). Would not want to push slope angle steeper because structure is still spooky. Also found suspicious interface and possible surface hoar 30cm from surface. Unreactive in formal tests but bears watching...

Avalanches

• Avalanche Description: Break in orographic cloudiness and flurries revealed MASSIVE avalanche in Redwell (north side of Mount Emmons). Looked to have failed within past 12hrs. Makes sense with efficient SW wind loading. Failed nearly wall to wall. R4, D3. observed from distance but look forward to investigating. Also looked to have pulled a sympathetic pocket lookers left, closer to Right and Wrong chute, opposite to Wolverine basin (NW facing)

	Date	Location/Path	#	Elev	Asp	Type	Trig	SizeR	SizeD
	2018/02/23  †	Redwell/Mt Emmons	1	>TL	N	HS	N	R4	D3
Date: 2018/02/23 (Estimated) Observer: Ian HAVLICK Organization: CBAC

Media

Images

Figure 1: hard to make out but look closely and crown on large sympathetic pocket visible. sun shows the one strip of bowl that has not ripped.