Sleet storm

Sleet storm is a conjuration spell that summons a rain of partially frozen water to hamper vision and movement.

Effect
Driving sleet blocks all sight (even darkvision) within it and causes the ground in the area to be icy, slowing movement to one-half normal. Additionally, any creature in sleet that attempts to move must succeed at a Reflex save or fall down instead. The sleet extinguishes torches and small fires.

Arcane Material Components
A pinch of dust and a few drops of water.