Bostonriff wrote:[x] symmetrical appearancecheezyWXguy wrote:Not annularBostonriff wrote:It's a steady-state top-ended hurricane with an annular appearance in an otherwise high pressure environment preventing it from growing larger in size.
[x] relative absence of convection occurring outside the CDO
[x] diurnal pulsation of the cirrus cloud canopy associated with outflow is subdued
[x] less prone to weakening as a result of negative environmental factors (such as that undercutting light westerly shear at ~250mb last night).
[x] maintain peak intensities for extended periods of time
[?] average or larger-than-average eye
...Dorian is a really small hurricane, and its eye might be considered average or larger for a storm of that diameter.
The (edit: second*) box certainly is not checked, as there is still very prominent banding in all quadrants. The remainder are not exclusive to annular hurricanes by any means, but Dorian's consistent eyewall structure (despite being smaller than average, to average) is probably the best case for your argument. Annular hurricanes come close to looking like a donut on IR, like Isabel did for a portion of its time as a cat5.
