What Does a Tornado Warning Mean?

A warning is an action message

National Weather Service forecast offices issue tornado warnings for defined polygons. The polygon matters more than the county name: a county may be mentioned even when only part of it is warned. Use an official map or a trusted local broadcast to check whether your exact location is inside.

Warnings may say “radar indicated” or “observed.” Both call for the same immediate shelter action. The wording describes the evidence available to forecasters, not whether you should wait.

Watch, warning, and emergency

A tornado watch covers a broad area where conditions may support tornadoes over several hours. A warning is smaller, shorter, and urgent. A tornado emergency is enhanced wording used for an exceedingly rare, life-threatening situation involving a confirmed tornado and a severe threat to a populated area.

Do not wait to see a funnel. Rain, terrain, darkness, and buildings can hide a tornado until it is very close.

How to respond

Go to a basement, safe room, or a small interior room on the lowest floor of a sturdy building. Stay away from windows and protect your head and neck. Bring shoes, a phone, and essential medication if they are within reach.

Continue monitoring official updates from shelter. A warning can be extended, replaced, or allowed to expire as the storm moves.

Frequently asked questions

Does a warning mean a tornado is on the ground?

Not always. Some warnings are based on radar rotation before a confirmed touchdown; others cite an observed or radar-confirmed tornado. Treat both as urgent.

How long does a warning last?

Many warnings cover tens of minutes, but the exact expiration appears in the warning. Stay sheltered until officials say the threat has passed.

Should I go outside to look?

No. Visibility can be poor and dangerous wind or debris can arrive before the visible funnel.