A thunderbird is surrounded by a 100-foot-radius spread of severe winds that blow out from the center, dissipating swiftly at the limit of the aura's range. In this area, ranged weapons suffer a -4 penalty on attack rolls and exposed flames are extinguished. Creatures must make a Paralysis save to move toward the thunderbird. In addition, once every 1d4 rounds, a bolt of lightning strikes a random creature (other than the thunderbird) within the area of its storm aura. This bolt of lightning deals 2d8 electricity damage (Breath save halves).