ALSAR AST 1

Quick report

Weather

cold, sunny

Ride Type

cutBlocks, mellowSlopes

Stayed Away

convexSlopes

Riding Quality

good

Snow Conditions

powder

Avalanche Conditions

avalancheConditionSlab, avalancheConditionSound

Snowpack

Depth

103

Obs Type

point

Site Aspect

N

Test Fracture

sudden

Site Elevation

1200

Test Initiation

veryEasy

Cracking Observed

1

Test Failure Depth

30

Site Elevation Band

btl

Surface Conditions

newSnow

Whumpfing Observed

1

Test Failure Layer Crystal Types

surfaceHoar

CTE 3 SC dwn 25 on SH 2.0 The initial profile site had to be abandoned after digging caused the targeted SH to collapse. (Easy compression test results score of 3, failure character sudden collapse, failing on surface hoar ~2.0-2.5cm in size) The recently buried SH layer is acting with touchy reactivity throughout the majority of the cut block we travelled through. Often walking off the FSR would cause large collapses, whumpfs and shooting cracks. Several small unsupported convexities had failed naturally, likely at some point in the storm.

Avalanche

Run Length

300

Slab Width

15

Trigger Type

natural

Avalanche Size

2

Slab Thickness

30

Start Zone Aspect

SE

Vegetation Cover

sparseTrees

Avalanche Character

stormSlab

Number Of Avalanches

2-5

Start Zone Elevation

1800

Weak Layer Burial Date

2025-01-31

Avalanche Observation

12to24hrsAgo

Weak Layer Crystal Type

surfaceHoar

Start Zone Elevation Band

tln

Avalanche Occurrence Datetime

2025-02-01T18:01:00.000Z

2 x Sz 2.0 Na Storm Slab avalanches observed on S-SE aspects. Suspect most recently buried SH to be the failure plane.