Snow Dust is activated by tossing a pinch into the air under the open skies. This has the following effects:
- The ambient air temperature drops to sub-freezing temperatures within ten minutes.
- The sky becomes cloudy and overcast, completely obscuring the sun.
- Precipitation immediately turns to snow and increases in intensity. If no precipitation is falling, there is a 25% chance per hour that snow will begin to fall. Snow accumulates at the rate of three inches per hour.
- Open water begins to freeze, accumulating one inch of ice per hour.