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Debby still has some work to do in order to fend off intrusions of abundant nearby dry air. Having been born from the interaction of a dry gyre and a second tropical disturbance, there are ongoing gaps in her structure needing to be filled. One way the cyclone is attempting to do this is by working on developing an inner core. For now, shear is supportive, and SSTs are more than supportive.
Other than a few isolated thunderstorms scattered along the northern rim, the rest of the Gulf (minus Debby) is remarkably devoid of low-level moisture for early August: GOMEX water vapor loop
Very moist to the east of Debby. A tighter core will be key to compensate for the current lopsided availability given the lack of shear and high- octane SST's.
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