ex-Humberto started firing deep convection again for a while earlier today, but that has now dissipated. In a day or so the storm will reach warmer waters and should start to refire persistent deep convection. Then the environment looks to become favourable for some notable re-intensification, potentially back to hurricane status.
The big story of the moment is Hurricane Ingrid, which has had a bit of a rough day thanks to Tropical Storm Manuel, a Pacific cyclone with a broad circulation and pronounced upper-level anticyclone stacked on top. It's the latter that's proved important, as it's been driving moderate to strong westerlies across Ingrid's upper levels, creating wind shear which has caused Ingrid to become ragged with convection almost displacing clear of the low level circulation. Even so, winds have held up in the 60's mph, perhaps a bit higher based on recon data. Despite the data, NHC has kept Ingrid as a minimal hurricane for some reason... possibly in anticipation of a sharp recovery in strength in the near future.
Why a sharp recovery? Manuel made landfall within the past hour or two, and as a result that storm is weakening. The associated upper-level anticyclone - created by upwelling air in the cyclone below - will diminish rapidly once the flow of air is cut off. This will cause wind shear to relax considerably across Ingrid, allowing for reorganisation and a new round of strengthening. The offical forecast only has an 80mph peak at the moment, but the previous one went for 100mph and I reckon the potential remains for Ingrid to peak close to that level.
Beyond the above two storms (three if you include the Pacific entity), it looks as if instability in the far-western Caribbean, associated with a developing low, could be the seed for another tropical system - very similar to how Ingrid began. Remnants from Ingrid following the storm's landfall in Mexico tomorrow or Tuesday could become part of the equation too. Models show the potential for a system to develop and head NE through Florida and then out into the Atlantic where GFS uses it to develop a broad trough near or to the NW the Azores - which is why recent runs have in FI tended to push warm tropical-maritime air towards the UK.
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