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.](https://en.ilmatieteenlaitos.fi/hli0qi7fbbos/7uqAqBCzuDYBTxLIYaEs3x/c191b7121d0289f6ef8f42cd1ea834cf/myrskytuho3_mattik__m__r__inen.jpg)
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.