Showers and storms quickly develop this afternoon south of I-40 in an unstable environment with dewpoints in the 70's, and CAPE values from 2000-3000. No severe weather was reported, and the storms quickly diminished around 5 p.m. The outflow boundary from the morning convection across NE OK and NW AR served as the focus for the storms to fire upon.

It's interesting to note that no additional thunderstorms developed across northwest Arkansas this afternoon due to a strong "meso high". This is a mesoscale high pressure area that's created by the rain cooled outflow from a convective complex. In other words, the rain cooled air creates a bubble of high pressure that keeps the atmosphere stable. These highs help to limit thunderstorm development throughout the afternoon due to the sinking nature of the air mass; however, the leading edge of the high acts like a cold front that can yield explosive convective development. We saw that just south of the River Valley.