Here’s a neat radar loop showing a “fine line” advancing slowly across coastal Mississippi and Mobile county, Alabama. It’s not rain, but rather a change in the density of the air from the moister (thicker) air behind the sea breeze. When the Radar beam passes through this density change, some of the Radar energy is reflected back. You can actually visualize this effect yourself by looking out a window. Do you see the slight reflection of yourself in the glass? That’s because a big change in den