The coastal stations are recording up to 27-28 meters per second in places such as Måseskär and Väderöarna off the Bohus coast, says duty meteorologist Hilda Westberg at SMHI at midday.
Further inland, at Landvetter Airport, winds of 17-18 meters per second are recorded.
"I also see on the radar image that quite heavy showers are passing over Dalsland, Värmland, down over Vättern and Västra Götaland. There is a bit of thunder with them too," says Westberg.
In Gothenburg, reports of fallen trees have begun to come in.
"We have trees falling here and there, and a boat on its side at Packhuskajen. We expect a high load ahead," says Mikael Lindgren, alarm and control operator at the Greater Gothenburg Rescue Service.
Traffic on the Älvsborgsbron is operating at reduced speed, as is traffic on the Uddevallabron, where heavy traffic has also been stopped. Bus traffic between Borås and Gothenburg is operating at reduced speed and without double-decker buses.
Extended warning
SMHI has issued an orange warning, the second highest level, for northwestern Götaland. It is valid until 2 a.m. Monday.
Gothenburg, Trollhättan, Uddevalla, Borås and Jönköping are among the cities expected to experience the strongest winds, but the storm has taken a more southerly path than initially thought.
"The orange warning has been extended down to northern Halland," says Hilda Westberg at SMHI.
The Swedish Transport Administration's website reports an increasing number of fallen trees across roads, and on road 44 between Uddevalla and Trollhättan, a barn roof ended up on the roadway.
"We have some concerns about various trees falling, but not on any of our major roads," says Daniel Mossberg at the Swedish Transport Administration's press service.
The storm is expected to culminate on the West Coast in the late afternoon and evening.
"It could be up to 32, maybe 33 meters per second in the gusts; then we're up to hurricane force in gusts," says Westberg at SMHI.
Further south
A yellow warning has been issued for an even larger area, which also extends across Södermanland and down into Småland. The lower yellow warning was also extended on Sunday morning.
The Swedish Transport Administration has raised its alert level to be able to take quick action. Several smaller routes in the area will be closed until 5 a.m. on Tuesday.
The Swedish Transport Administration advises avoiding unnecessary car trips in areas covered by orange warnings.
"You shouldn't go out unless you absolutely have to," says Mossberg.
