Details

• Date: 2019/05/11

• Observer: Everett Phillips
• Organization: Public

Location

• BC Zone: Front Range
• Area Description: Tyndall Gorge, Couioirs on North side of Emerald Lake

Weather

• Weather Description: Flattop Mountain, RMNP, ATL, SE aspect, 1300hrs Sky: FEW Winds: Moderate, NW Precip: S-1 Wind Transport observed previous. Temp: Temps, near 0 deg. C (at freezing point)

Snowpack

• Snowpack Description: Flattop Mountain, RMNP, ATL, SE aspect, 1300hrs. Surf. Dry to Moist Wind Broken Percip. Particles HS: 0 to over 300 cm (Wind scouring on ridgeline and deep wind deposits in lee start zones) HST: 25 cm Layer of Concern: 20190508 New/Old interface (Precip. Particles above strong Melt-Freeze Crust) Slab properties: Hard Slab, 30cm to 100cm thick made up of Wind Broken particles. Ski-pen 5-10cm where avalanche was triggered.

Avalanches

• Avalanche Description: HS-AS-R2,D2, SE aspect ATL, 45 deg. Multiple WS-N-R1-D1 S and SE aspcts, NTL, 35 to 45 deg. At approx. 11:00 AM 20190511 Rangers in RMNP responded to an avalanche incident in the "Dead Elk Couloir". The size 2 avalanche that initiated our response was determined to have been triggered by a solo skier entering the couloir from the ridgeline above. Two visitors were partially buried, but fortunately there were no full burials and no significant injuires.

	Date	Location/Path	#	Elev	Asp	Type	Trig	SizeR	SizeD
	2019/05/11	Rocky Mountain National Park	1	>TL	SE	HS	AS	R2	D2
Date: 2019/05/11 Time: 11:30 AM (Estimated) Observer: Everett Phillips Organization: Public Area Description: Dead Elk Landmark: Rocky Mountain National Park Comments: Triggered by skier. Two people from another party caught and partially buried-not critical.
	2019/05/11  †		10	TL	SE	WS	N	R1	D1
Date: 2019/05/11 (Estimated) Observer: Everett Phillips Organization: Public

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