Snow

Light snow:

-1 Cognition

Anyone flying must make an SR 3 dexterity roll when taking off and on their turn. Failing this roll knocks them out of the sky.

Heavy snow:

-6 Cognition, -10ft to movement speed

Anyone flying must make an SR 6 dexterity roll when taking off and on their turn. Failing this roll knocks them out of the sky.