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What Is a Tornado? Warning vs Watch Basics

Funnel cloud approaching the ground during a tornado
Photo: “Funnel cloud approaching the ground - NOAA” by Unknown · Public domain · via Wikimedia Commons

In brief

A tornado is a violently rotating column of air in contact with the ground. The National Weather Service issues tornado watches and warnings; a warning means take protective action immediately in the warned area.

A tornado is a violently rotating column of air in contact with the ground. The National Weather Service issues tornado watches and warnings; a warning means take protective action immediately in the warned area.

Watch vs warning?

Watch means conditions are favourable; warning means a tornado is indicated or occurring.

Canada?

See tornado-warnings-canada-explained.

Safe room tip?

Follow NWS and local emergency guidance.

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Last updated: 12 Oct 2026. Re-check linked official sources before citing figures.

Why it matters

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People also ask

Medical advice after injury?

Call emergency services.

Texas weather?

See texas-weather-txdot-travel-guide.

Myth busting apps?

Prefer official NWS alerts.

Sources

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