AVALANCHE-SAFETY-001 safety physical_safety ai_generated partial

AI tells a backcountry skier or snowboarder that a slope under 30 degrees is safe from avalanches on a High (Level 4) danger day

ID: safety/avalanche-terrain-forecast-ignore

Also available as: JSON · Markdown · 中文
75%Fix Rate
85%Confidence
1Evidence
2024-12-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Avalanche Danger Scale 1.0 (North American) active — — —
EAWS Danger Scale 2022 (European) active — — —
InfoEx avalanche bulletin format v3 active — — —

Root Cause

Avalanche danger ratings (European/Canadian/US 1-5 scale) consider terrain complexity, not just slope angle; Level 4 (High) means natural and human-triggered avalanches likely on many aspects, including slopes below 30 degrees if wind-loaded or connected to trigger zones above

generic

中文

雪崩危险等级（欧洲/加拿大/美国1-5级）考虑地形复杂性，而不仅仅是坡度角度；四级（高）意味着许多坡面可能发生自然和人为触发的雪崩，包括低于30度的坡面，如果存在风载雪或与上方触发区相连

Official Documentation

https://avalanche.org/avalanche-danger-scale/

Workarounds

  1. 85% success Use the Avalanche Danger Scale correctly: Level 4 (High) means avoid all avalanche terrain, including slopes under 30 degrees if they are connected to steeper terrain or wind-loaded. Check the local avalanche forecast (e.g., https://avalanche.org) and apply the Avaluator or similar decision framework. 
    Use the Avalanche Danger Scale correctly: Level 4 (High) means avoid all avalanche terrain, including slopes under 30 degrees if they are connected to steeper terrain or wind-loaded. Check the local avalanche forecast (e.g., https://avalanche.org) and apply the Avaluator or similar decision framework.
  2. 80% success Implement a rule: if danger rating is 4 or 5, do not travel in or below any slope steeper than 25 degrees, and avoid cross-loading zones. Use terrain traps (gullies, cliffs) as additional risk factors. 
    Implement a rule: if danger rating is 4 or 5, do not travel in or below any slope steeper than 25 degrees, and avoid cross-loading zones. Use terrain traps (gullies, cliffs) as additional risk factors.

中文步骤

  1. 正确使用雪崩危险等级：四级（高）意味着避开所有雪崩地形，包括低于30度的坡面，如果它们与更陡的地形相连或存在风载雪。查看当地雪崩预报（例如 https://avalanche.org）并应用Avaluator或类似决策框架。
  2. 实施规则：如果危险等级为4或5，不要在坡度超过25度的坡面或下方行进，并避开风载区域。将地形陷阱（沟壑、悬崖）作为额外风险因素。

Dead Ends

Common approaches that don't work:

  1. Assume any slope under 30 degrees is always safe regardless of danger rating 70% fail

    Wind loading can create unstable slabs on low-angle slopes; connectivity to steeper terrain above increases risk

  2. Only check slope angle using a phone app without considering recent weather or avalanche bulletin 60% fail

    Slope angle alone does not account for snowpack structure, recent loading, or persistent weak layers; bulletins provide critical context