Thunderstorms are expected to sweep across Finland on Friday, with the Finnish Meteorological Institute warning that the most severe conditions may hit the west first.

The FMI has issued thunderstorm warnings for the day as the weather system moves across the country. At this stage, the main confirmed concern is widespread lightning and stormy conditions, while the exact local impacts will depend on where the cells develop and how they track.

The warnings matter because thunderstorms can quickly disrupt travel, outdoor plans and power supply, especially if the strongest storms intensify in a short time.