The authority warns yellow to sudden ice skating this weekend. The warning applies to northwestern Svealand and parts of western Norrland from 17 on Saturday until five in the morning on Sunday.
Parts of Ångermanland, southern Västerbotten and northeastern Jämtland can also be affected during Saturday.
For eastern Norrland, the same warning applies from the night towards Sunday and a bit into Sunday afternoon.
The reason is a rain area that moves in from the west and that can freeze on the roads, something can cause ice slip. Subscribed rain can also occur.
The authority urges travelers to adapt the speed to the road conditions and set aside longer for their journey. Delays and canceled departures in public transport can also occur, writes SMHI.