Storm of Elemental Fury

With a thunderous boom, a black storm cloud appears over your enemies, striking them with a terrifying combination of effects from the Elemental Planes.

(Spell Compendium, p. 209)  
Originally posted on D&D tools

Conjuration (Summoning)

Level: Druid 7,
Components: V, S,
Casting Time: 1 round
Range: Long (400 ft. + 40 ft./level)
Effect: 40-ft.-radius storm cloud, 200 ft. above the ground
Duration: 4 rounds
Saving Throw: See text
Spell Resistance: Yes

Each round, the storm generates one of the following effects, starting with the first effect, then progressing to the second, until it has run its 4-round course.

• 1st Round: A storm of elemental fury buffets the area immediately beneath it with a whirling windstorm (DMG 94-95). Ranged attacks within the area of the storm are impossible, and Small or smaller creatures must succeed on a Fortitude save or be blown away. Medium creatures must make their Fortitude save or be knocked prone, and Large or larger creatures must succeed on a Fortitude save to move that round. Flying creatures that fail their saves are instead blown in a random direction, traveling 1d6×5 feet if Large or larger, 1d6×10 feet if Medium, and 2d6×10 feet if Small or smaller. Spells cast within the area are disrupted unless the caster succeeds on a Concentration check against a DC equal to the storm of elemental fury’s save DC + the level of the spell the caster is trying to cast.
• 2nd Round: Chunks of rock fall from the sky, dealing 5d6 points of damage (no save) to all creatures in the storm.
• 3rd Round: A deluge of rain extinguishes unprotected flames and perhaps protected ones as well (50% chance). The torrential downpour reduces visibility to 5 feet and cuts movement in half.
• 4th Round: Flame pelts the area beneath the storm cloud, dealing 1d6 points of fire damage per caster level (maximum 15d6) (Reflex half).