It wasn’t rain. It wasn’t smoke. And no, it wasn’t a crop circle from the sky.
A striking “roost ring” spotted on radar by the National Weather Service in Melbourne was most likely the signature of birds taking off around sunrise from a communal roost, creating a circular or doughnut-shaped pattern as they spread out in all directions. The NWS says weather radar can detect more than precipitation, including birds departing roost sites in roughly equal densities.
These rings often show up near bodies of water and during periods when birds gather overnight, then lift off together after daybreak. As the birds fan outward and gain altitude, radar can briefly pick them up before they rise above or drop below the radar beam.
So while the term “roost ring” can sometimes be used on the ground for vegetation flattened by roosting birds, the version seen on weather radar is an airborne pattern, not damage on the landscape. In this case, the radar image appears to have captured a natural morning launch from one of Florida’s feathered overnight hangouts.
See also: National Hurricane Center unveils new forecast cone for 2026 hurricane season
It’s one more reminder that Florida’s radar can tell some pretty wild stories — even when the weather is perfectly quiet.
Comment with Bubbles
BE THE FIRST TO COMMENT
CBS12 Chief Meteorologist Greg Rule noticed the phenomenon today and shared it on Facebook.