UPDATED Thursday, Sept. 4, 2025, at 9:30 a.m. ET

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That disorganized tropical disturbance we've been watching has been designated Invest 91L by the National Hurricane Center. The system is crawling in the general direction of the Caribbean Islands. It is producing more thunderstorms today, but there is no sign yet of significant organization.

The National Hurricane Center is still drawing a large potential development area due to the uncertainty of when the system

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