From the upcoming Frostbitten & Mutilated (formerly Black Metal Amazons of the Devoured Land)
Place these on the random encounter table in polar regions:
Ice Storm--The weather is piercing, impossible, moving forward is hard labor at best. Every PC must roll succeed on a Strength check or movement is impossible for 10 minutes x the number of points the check was failed by. Anyone not in some kind of shelter beyond normal cold-weather gear must save or take 1 hit point of damage for every 10 minutes in the cold.
Ice Storm+ Encounter--As above plus roll again--something's coming.