What is Super Typhoon Saola’s ‘double eyewall’? Hong Kong experts say 2 cloud rings typical of very strong storms, seen among half of US hurricanes

By Connor Mycroft

Observatory says ‘eyewall’ refers to thick circular ring of clouds surrounding centre of the storm, where winds are at their fiercest.

Source: What is Super Typhoon Saola’s ‘double eyewall’? Hong Kong experts say 2 cloud rings typical of very strong storms, seen among half of US hurricanes