SJ is reducing its services on several lines until March. The reason given is ”extreme amounts of snow and severe cold”. 

”If the winter is prolonged, it's not impossible that the reduction period will be even longer,” SJ writes in a press release. 

The routes affected are: Stockholm-Gothenburg, Stockholm-Malmö, Stockholm-Umeå, Stockholm-Uppsala and Linköping-Stockholm-Gävle.

Source: Aftonbladet.se