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I'm extremely concerned that Melissa is undergoing rapid intensification – or I suppose rapid reintensification – again as it approaches Cuba. The core/eye have RAPIDLY reorganized and the EEL – Enveloped Eyewall Lightning – signature has re-appeared. Cat-4 impact possible!

175,455 görüntüleme • 8 ay önce •via X (Twitter)

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LOOK AT THESE! You've probably never heard of "mesovortices," but the eyes of major/intensifying hurricanes, like Category 5 Melissa, actually contain addition, smaller whirls a few miles across. Mesovortices are a few miles across; they form as a way to balance an extreme discontinuity in angular momentum. In the buzzsaw-like eyewall – that ring of winds spiraling around the eye – there's an incredible amount of extreme wind and "angular momentum." But in the eye, there's hardly any – the air is calm. That means the eyewall "chafes" against the calm eye. Since the atmosphere is a fluid, that chafing pinches off into eddies and vortices. Think about when you're kayaking or canoeing through a pond. You might notice a few whirlpools shedding off your oar as the moving oar sweeps through the stationary water. A similar premise exists here. In this case, the atmosphere handles the transition from the eyewall to the eye by having some of the fluid "curl back" on itself, forming 4, 5 to 6 smaller "mesovortices." This eye exhibited a "wavenumber 5" pattern, meaning there were five mesovortices. The mesovortices often contort the inner edge of the eyewall into a wonky "sawtooth" pattern. That means that, if you stand right near the interface, you'd have about 5 minutes of "in... out... in... out" where, despite being basically in the eye, ebbs of the eyewall could still swing through and bring you a sudden, extreme gust. Welcome to the magic of fluid dynamics in the atmosphere.

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198,950 görüntüleme • 8 ay önce