Quote: My question is after it enters the Fla Straits near Key West, what prevents it from going back to a Cat V? Does it have anything to do with a Northward movement?
This from the latest tropical weather discussion "... AN UPPER LOW NE OF THE BAHAMAS DRIFTING SW MAY IMPINGE UPON THE OUTFLOW DURING THE NEXT DAY OR SO. ... THE BIG FEATURE OVER THE SUBTROPICAL ATLC IS THE MID-OCEANIC UPPER TROUGH WHICH CONTINUES TO FRACTURE FORMING A VERY LARGE UPPER LOW NEAR 29N60W. THE UPPER LOW IS NOW RETROGRADING QUICKLY WESTWARD AND ERODING THE MID/UPPER LEVEL RIDGE WHICH HAS PERSISTED OVER THE W ATLC FOR SEVERAL DAYS. STRONG SUBSIDENCE AND DRY AIR WITH THE UPPER LOW IS SPREADING WESTWARD AND NOW COVERS A GOOD PORTION OF THE W ATLC TO THE SE UNITED STATES COAST." In a word, "shear."
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