Lightning struck near Rengård, some 45 kilometres north-west of Skellefteå, at around 8pm on Sunday, causing a power outage for around 43,000 homes in the area.
Regional newspaper Norran also reported that its computer system and telephones had been knocked out, forcing it to take to Facebook to inform readers about what was going on.
Thousands of customers were still without power after midnight, but by 2am only around ten households remained affected, according to electricity provider Skellefteå Kraft.
The Västerbotten region was not the only area hit by thunderstorms and severe weather over the weekend. Tornadoes were spotted in southern Skåne as well as Södermanland, the region south of Stockholm, according to national weather institute SMHI.
— SVT Nyheter Sörmland (@svtsormland) July 31, 2016
Tornadoes are not unusual in Sweden in summer, but they are not as powerful as their counterparts in for example North America. However, SMHI forecasters warned Swedes not to go near them as they follow the thunderstorms northwards this week.
“It has such power that it is able to throw around loose objects,” meteorologist Alexandra Ohlsson told the TT newswire.
On Monday the weather agency also issued a warning for forest fires in eastern parts of Sweden, from Skåne in the south to Västernorrland county.