Many webpages inform about the up-to-date weather and other related topics:
The Videotext of the Swedish Television is available in the
The view on northern Sweden from a satellite orbit near the
equator is not so good. The following page shows the clouds and
is fairly well up-to-date:
Near Abisko Turiststation at the northern end of Kungsleden is Abisko Research Station, and their meteorological observations are available in the Internet.
The Geophysical Institute in Sodankylä/Finland shows pictures of northern lights.