1. each hour below 40* DC15 (+1 per save current DC17) or 1d6 non-lethal.
1b. below 0* check every 10 min
1c. below -20* check every min or 1d4 non lethal + 1d6 lethal no save.
2. Once Lethal damage has been taken Frostbite is possible. Type hazard (exposure); Save Fortitude (DC 16 severe cold, DC 20 extreme cold, DC 24 supernatural cold); Onset failed save; Frequency Severe cold (1/10 minutes), extreme cold (1/minute), supernatural cold (1/rd.) Effect 1 Constitution drain
3. Snow halves movement
4. Falling snow reduces visibility and causes a loss of perception. 60'/-2 Light 40'/-4 medium 20'/-6 heavy
