AI告诉野外滑雪者，在四级高危险日，坡度低于30度的斜坡是安全的，不会发生雪崩
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
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| Avalanche Danger Scale 1.0 (North American) | active | — | — | — |
| EAWS Danger Scale 2022 (European) | active | — | — | — |
| InfoEx avalanche bulletin format v3 | active | — | — | — |
根因分析
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
English
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
官方文档
https://avalanche.org/avalanche-danger-scale/解决方案
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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。
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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。
无效尝试
常见但无效的做法:
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Assume any slope under 30 degrees is always safe regardless of danger rating
70% 失败
Wind loading can create unstable slabs on low-angle slopes; connectivity to steeper terrain above increases risk
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Only check slope angle using a phone app without considering recent weather or avalanche bulletin
60% 失败
Slope angle alone does not account for snowpack structure, recent loading, or persistent weak layers; bulletins provide critical context