Avalanche Risk Calculator
Estimate avalanche danger rating from slope angle, snowpack stability, recent snowfall, wind loading, and temperature trends. Uses the North American Avalanche Danger Scale.
Inputs
Results
Danger Rating
3
How to Use This Calculator
- Enter Slope Angle (°) — measure with a clinometer or avalanche probe; 30-45° is the highest risk zone.
- Select Snowpack Stability from the current local avalanche forecast (stable, watch, poor, or very poor).
- Enter Recent Snowfall (cm in last 48 hours) — new snow loading is a primary avalanche trigger.
- Select Wind Loading level (none, moderate, heavy, extreme) for the terrain you plan to travel.
- Choose Temperature Trend (warming, stable, or cooling) — rapid warming significantly increases wet avalanche risk.
- Review Danger Rating and Travel Advice to decide whether to proceed, modify your route, or turn back.
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