We have an atmosphere that is trying to destabilize, with the approach of a disturbance. However, our air here at the surface is cool, stable, and dry. That means we are getting some cool clouds out there but very little rainfall. Go out and look up.

You’ll notice a “ripple-effect” look to the clouds. That is alternating areas of rising and sinking air, much like what happens when you see ripples on a pond after throwing a rock in. This is the unstable air moving atop our stable surface layer, causing ripples.