The closest thing we got to an avalanche service in Norway is varsom.no. Here is a link to the english page for Lofoten: http://www.varsom.no/en/Snow-avalanche/Lofoten/#.UXfP-CsuDys
You can also contact Northern Alpine Guides (http://www.alpineguides.no/norway/lofoten-ski-guides/) i guess they will be happy to answer any questions you have about the snow conditions. They also offer housing.
I would recomend going to Lofoten late february through march. The sun is back up again and snow conditions are often good then. If staying in Svolvær, Kabelvåg or Henningsvær you can pretty much reach most of the island by car in one day. The famous lofoten cod (skrei) is also moving in close to Lofoten so you can go fishing as well on down days.
