Wind Archer's Storm Ability

Does anyone know what the range of attack is for a maxed Storm? Is it like a near area effect? The reason I'm asking is I'm positive this was a hacker (reported him anyway), but I saw a level 62 WA in the Garden of Colors standing by the bottom stairs and using Storm and he was hitting pretty much the whole map.

Then I questioned it because I know the Thief one has a pretty large bat range at max.