Avalanche Risk Calculator
Estimate avalanche risk level using slope angle, recent snowfall, wind, and temperature trend.
How to Use the Avalanche Risk Calculator
- Select the slope angle range of your terrain.
- Enter recent snowfall in centimeters (last 48 hours).
- Select wind speed conditions.
- Select the current temperature trend.
- Click Calculate to see the risk level and score.
Use Cases
- •Educational tool for backcountry skiers learning about avalanche factors.
- •Quick field assessment aid for tour planning.
- •Teaching avalanche safety concepts in outdoor education.
Formula
Formula: Risk score = slope score (1-5) + snowfall score (1-4) + wind score (1-3) + temperature trend score (1-3). Low ≤5, Moderate ≤8, Considerable ≤11, High ≤13, Extreme >13.
Frequently Asked Questions
What slope angle is most dangerous for avalanches?
Slopes between 30° and 45° are the most avalanche-prone. Steeper slopes (>45°) often shed snow continuously preventing large build-up.
How does recent snowfall affect risk?
Heavy snowfall (>60 cm) rapidly increases risk as the new snow load can exceed the strength of the underlying snow layers.
Is this calculator a substitute for official avalanche forecasts?
No. This tool provides a simplified educational estimate only. Always consult local avalanche centers and carry appropriate safety equipment in the backcountry.