During Thursday evening and night into Friday there is a risk of severe thunderstorms which can cause, among other things, disruptions in the electricity supply. Very strong gusty winds and Locally heavy rain may also occur in connection with the thunderstorm. ; What happens?: During Thursday evening and Friday night, showers with severe thunderstorms and very strong gusts of wind are expected to move in from the Gulf of Bothnia. The exact location and timing of the thunderstorm is difficult to assess.; What should I think about?: It may be dangerous to be outside in intense lightning. Stay away from tall objects suck as trees, and avoind swimming. Roads may be blocked by fallen trees or branches. Risk of damage to forest, for example in felling edges and newly thinned forest. Lightning strikes can cause disturbances in electricity and telecommunications networks as well as in train- and air traffic, and there is a risk of fires.; Where?: Central Norrland coastal region from Härnösand to Piteå; Comments: It is uncertain where in the area the strongest thunderstorms will pass and when they will move in over the coast.