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SESK: Stuff Everyone Should Know · sesk.info/ski-avalanche-danger-five-levels

How many levels are on the North American avalanche danger scale?

Five: Low, Moderate, Considerable, High, Extreme.

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  1. Three
  2. Ten
  3. Five ✔

Why: Forecasters rate danger from 1 (Low) to 5 (Extreme): Low, Moderate, Considerable, High and Extreme. Each level comes with travel advice.

Huh, didn't know that: At High (level 4), natural avalanches are likely and human-triggered avalanches are very likely.

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Why was the snowman so good at baseball? He had a wicked slider.
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References

Answer: Five. Forecasters rate danger from 1 (Low) to 5 (Extreme): Low, Moderate, Considerable, High and Extreme. Each level comes with travel advice.

  1. Avalanche.org: Avalanche Encyclopedia avalanche.org/avalanche-encyclopedia
    Considerable Danger (Level 3)
    Checked 2026-10-10.
  2. Avalanche.org: Avalanche Encyclopedia avalanche.org/avalanche-encyclopedia
    Extreme Danger (Level 5)
    Checked 2026-10-10.
  3. Avalanche.org: High Danger (Level 4) avalanche.org/avalanche-encyclopedia/avalanche-forecast-danger/high-danger-level-4
    Natural avalanches are likely and human-triggered avalanches are very likely.
    Checked 2026-10-10.

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Outdoors & CampingAt Considerable (level 3) avalanche danger, human-triggered slides are:Outdoors & CampingAt Extreme (level 5) avalanche danger, what is the travel advice?Outdoors & CampingWhen should your avalanche beacon be worn and turned on?

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