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Finnish Meteorological Institute

Severe thunderstorm warning

Severe thunderstorm warnings contains warnings on thunderstorm gusts.

Strong wind gusts may occur in connection with thunderstorms, causing a lot of damage. Severe thunderstorm warnings contains warnings on thunderstorm gusts. There are not any lightning warnings, but in emergency warnings there are.

Trees has fallen.
Photo: Matti Kämäräinen

There are three different awareness levels for thunderstorm gusts.

The warning is issued when the wind in thunderstorm gusts is

  • more than 15 m/s (yellow warning)

  • more than 25 m/s (orange warning)

  • more than 30 m/s (red warning).

Warnings on thunder gusts are issued max. five days in advance.

For more information about other wind warnings, see page on wind warnings.