Flash flooding in Pike and Wyoming Counties on May 12, 2004 was associated with intense stationary thunderstorms.
The environment associated with the event was in many ways "classic" for flash flooding.
Key characteristics included moderate instability with "skinny" CAPES, high precipitable waters, a low-level jet oriented perpendicular to a low level boundary, and light, weakly sheared flow aloft.
Weak forcing aloft resulted in the storms focusing on low-level mesoscale boundaries and terrain.