{
  "id": "safety/avalanche-slope-angle-error",
  "signature": "AI tells a backcountry skier that a slope under 30 degrees is safe from avalanches on a High (Level 4) danger day, or that all south-facing slopes are safe in spring",
  "signature_zh": "AI告诉野外滑雪者，在高级（4级）危险日坡度低于30度是安全的，或所有南向坡在春季都是安全的",
  "regex": "avalanch.*(?:slope.*30|30.*degree|safe.*aspect|south.*face)",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "Avalanche danger depends on snowpack structure, not just slope angle; slopes under 30° can slide if triggered from above, and aspect (direction) interacts with sun exposure, wind loading, and temperature cycles; High (Level 4) means widespread instability on many aspects and elevations.",
  "root_cause_type": "generic",
  "root_cause_zh": "雪崩危险取决于雪层结构，而不仅仅是坡度；低于30°的坡度若从上方触发可能滑动，坡向（方向）与日照、风载和温度循环相互作用；高级（4级）意味着多个坡向和海拔广泛不稳定。",
  "versions": [
    {
      "version": "North American Avalanche Danger Scale 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "CAIC Avalanche Forecast v3.2",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "Avalanche.org 2025",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Trigger from above (skier, cornice fall) can release slab on low-angle terrain below; terrain traps increase risk.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Solar warming melts snowpack, creating wet slabs that can release; south aspects are most prone to wet avalanches in spring.",
      "fail_rate": 0.65,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Micro-terrain features (ridgelines, gullies) can create localized instability even in areas rated 'Moderate'.",
      "fail_rate": 0.75,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "On High (Level 4) days, avoid all avalanche terrain (slopes over 30°) and terrain traps; travel only on low-angle (<20°) slopes with no overhead hazard; use 30-45-90 rule: avoid slopes 30-45°, be cautious of slopes >45° for cornice fall.",
      "success_rate": 0.9,
      "how": "On High (Level 4) days, avoid all avalanche terrain (slopes over 30°) and terrain traps; travel only on low-angle (<20°) slopes with no overhead hazard; use 30-45-90 rule: avoid slopes 30-45°, be cautious of slopes >45° for cornice fall.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Perform a terrain assessment: check slope angle with inclinometer, look for recent avalanche activity, avoid convex rolls and wind-loaded features; dig a snowpit and perform stability tests (ECT, CT) before committing.",
      "success_rate": 0.85,
      "how": "Perform a terrain assessment: check slope angle with inclinometer, look for recent avalanche activity, avoid convex rolls and wind-loaded features; dig a snowpit and perform stability tests (ECT, CT) before committing.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use the 'Avaluator' or 'Slope Angle' app to map terrain; carry avalanche safety equipment (beacon, probe, shovel) and travel one at a time on suspect slopes.",
      "success_rate": 0.8,
      "how": "Use the 'Avaluator' or 'Slope Angle' app to map terrain; carry avalanche safety equipment (beacon, probe, shovel) and travel one at a time on suspect slopes.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "在高级（4级）危险日，避开所有雪崩地形（坡度超过30°）和地形陷阱；仅在低角度（<20°）且无上方危险的坡面行进；使用30-45-90规则：避开30-45°坡度，对>45°坡度警惕落雪檐。",
    "进行地形评估：使用坡度计检查坡度角，观察近期雪崩活动，避开凸起和风载特征；挖雪坑并进行稳定性测试（ECT、CT）后再行进。",
    "使用'Avaluator'或'Slope Angle'应用绘制地形；携带雪崩安全装备（信标、探杆、雪铲），在可疑坡面逐一通过。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://avalanche.org/avalanche-danger-scale",
  "official_doc_section": null,
  "error_code": "AVALANCHE-SLOPE-ANGLE-ERR",
  "verification_tier": "ai_generated",
  "confidence": 0.88,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2025-02-14",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}