Field Report
Southern San Juan - CO
2025/02/15
Backcountry Area: Southern San Juan
Author: Jeremy Yanko
Organization: Forecaster, CAIC
Report Information
Observation Summary
Noticed a large avalanche in the "4th of July" couloir during some clearing skies in the morning. Also saw some wall to wall storm slab/Dry Loose activity in the "golden boy/north shore" area.
Area Description
North Twilight Peak/ Crater Lake
Route Description
AM highway observations
Avalanches
Saw an avalanche
One large natural above treeline off North Twilight. Multiple small releases or one large? In steep cliff zone below treeline on summit of Coal Bank
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Date | # | Elev | Asp | Type | Trig | SizeR | SizeD | Problem Type |
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02/14/2025
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>TL | NW | SS | N | R3 | D2.5 | Storm Slab | ||
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Date and Time
02/14/2025 -
12:00pm
(estimated)
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02/14/2025
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<TL | N | SS | N | R3 | D2 | Storm Slab | ||
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Date and Time
02/14/2025 -
12:00pm
(estimated)
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Snowpack
Cracking:
None
Collapsing:
Rumbling
Experienced a rumbling collapse at the Molas study plot. 2 1/2 day storm totals Molas 27"/ 2.1" SWE Coal Bank 30.5" / 2.35" SWE
Weather
Partly Cloudy and calm 18F