SMHI has expanded its yellow warnings for thunderstorms on Midsummer's Day to include the entire Norrland coast and large parts of the inland.
The warning covers heavy thunder and large local amounts of rain up to Haparanda from 4 p.m. to 11 p.m. on Saturday.
According to meteorologist Erik Höjgård-Olsen at SMHI, a warm and humid air mass is sweeping in from the south over the area.
SMHI warns of risks of flooding as well as disruptions to electricity and telecommunications networks.
A yellow warning had already been issued for Götaland, large parts of Svealand and the southeasternmost part of Norrland.
