Storm clouds cover the area as wind and lightning pummel the region. The wind in the area increases to hurricane force winds with the wind in each square blowing a random direction each round. These winds render ranged attacks impossible, and siege weapons take a –8 penalty on attack rolls. Large or smaller creatures must succeed at a DC 15 Strength check or they are unable to move forward against the strength of the wind. Medium or smaller creatures on the ground must succeed at a DC 15 Strength check or they are knocked prone and roll 1d6x10 feet, taking 1d6 points of nonlethal damage per 10 feet. Flying creatures must succeed at a DC 25 Fly check or they are blown back 2d8×10 feet and take 4d6 points of nonlethal damage due to battering and buffeting. Each round, creatures, objects, and structures in the area have a 50% chance to find themselves in the path of wild lightning bolts that snake every which way without reason. Creatures, objects, and structures hit by a bolt take 10d8 electricity damage.

In addition, the ruckus caused by the storm makes it impossible to hear creatures more than 5 feet away.