Actually it's spray from the falls, I know this because both my camera and myself were soaked after wandering around Storforsen. The positive is the beautiful soft light that you get through the mist.
Even better that the clouds were fairly heavy and gave a nice overcast light.
The amount of water cascading through the park is pretty impressive and will only get heavier as more snow melts further upstream.
Away from the falls the paths through the old trees and moss covered boulders looked beautiful as the moisture in the air made everything appear damp.
Anyway, it was a nice hour break from work and chance to grab a few quick shots!