Kelvin Helmholtz Wave Clouds in CT

Some viewers emailed me asking......what were these clouds in the sky yesterday???

Is this an awesome picture or what? A big thank you to Trish who snapped this photo along I-91 Monday5-14-07 at 1:41PM.

These clouds are called Kelvin Helmholtz Wave Clouds or (KH) instability clouds. They are formed by the interaction of different velocities between two relatively stable layers. For more information....click here.

There was generally a NW component to the wind at or above 850mb when these clouds were observed. Speeds were up to about 100kt close to 300mb.