Eyewall replacement cycle
Videos
In meteorology, an eyewall replacement cycle, also called a concentric eyewall cycle, is a process whereby some of the outer rainbands of a tropical cyclone with an eye strengthen and organize into a
1966 photo of the crew and personnel of Project Stormfury.
Hurricane Juliette, a rare case of triple eyewalls.
Imagery from the Tropical Rainfall Measuring Mission shows the beginning of an eyewall replacement cycle in Hurricane Frances.
A microwave pass of Cyclone Phailin revealing the moat between the inner and outer eyewalls.
Annular tropical cyclone
Videos
An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete
Satellite image of Hurricane Isabel of 2003, displaying a large, circular, and symmetric eye, and symmetrical storm shape, which are characteristics of annular tropical cyclones. Isabel is also exhibiting a pinwheel eye, a rare feature found in some annular tropical cyclones.
Typhoon Surigae of 2021 displaying annular characteristics
Typhoon Noru of 2017, displaying most of annular characteristics