Professional Observation
Basic Information
Observation Details
Observation Date:
January 29, 2020 - January 29, 2020Submitted:
January 29, 2020Observer:
ProZone or Region:
Sawtooth and Western Smoky MtnsLocation:
Grand MogulSigns of Unstable Snow
Recent Avalanches?
YesCracking?
None ExperiencedCollapsing?
None Experienced
windslab problem touchy above 9500, N, NE aspects
multiple sluffs on solar sunkissed rockbands which then entrained H24 below
multiple sluffs on solar sunkissed rockbands which then entrained H24 below
Snow Stability
Stability Rating:
FairConfidence in Rating:
ModerateStability Trend:
Bottom Line
solar aspects quickly picked up a lot of heat today. multiple sluffs seen which then gained enough energy to entrain H24 (15-25cm) below resulting in multiple D1-D2 seen on this tour.
intentionally triggered touchy windslabs on high (>9200ft) N to E aspects. one in steeper terrain >40* entrained H24 resulting in D2
Advanced Information
Weather Summary
CLR to BKN. very calm am, NW winds picked up from NW after 1500 but little deposition noted.
H24 - 20-25 . PS- 15-20.
Avalanche Observations
| # | Date | Location | Size | Type | Bed Sfc | Depth | Trigger | Comments | Photo |
|---|---|---|---|---|---|---|---|---|---|
| mulitple (>5) | Past 24 hours |
S-SE- E aspects 8500-9500 |
WL | 20-30 |
N-Natural u-Unintentional |
pictured: D2 of WL, then entrained H24 on E aspect |
|
||
| 1 |
|
|
|||||||
| 1 | Today |
N 9500 |
D2 | WS | I-New/Old Interface | 20 |
AS-Skier c-Intentional |
triggered on belay on obviously windloaded slope at convexity. 40* | None |