National Hurricane Center: The National Hurricane Center (NHC) has upgraded the formation chance of a low-pressure system in the northeastern Gulf of Mexico, designated as Invest 91-L, to an 80% chance of becoming a tropical cyclone over the next 48 hours. Forecasters note that a tropical depression is highly likely to form as the system tracks slowly north or northwestward.
National Hurricane Center: Florida on Alert as US Hurricane Center Sees Higher Chance of Cyclone
The National Hurricane Center (NHC) has issued an updated advisory raising the development chances for Invest 91-L to a high 80% chance over both the next 48 hours and the next 7 days. Positioned in the northeastern Gulf of Mexico, the low-pressure system continues to gain organization, and a tropical depression is officially expected to form between Sunday and Monday as it slowly drifts north-northwest.
National Hurricane Center: Current Status
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Designation: Invest 91-L (AL91).
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Location: Over the northeastern Gulf of Mexico, sitting just off the coast of Florida.
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Movement: Tracking slowly northward to northwestward.
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Potential Name: If it intensifies into a named tropical storm, it will be called Bertha.
National Hurricane Center: Expected Regional Impacts
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Heavy Rainfall & Flooding: The primary threat is flash flooding driven by slow-moving, repeated downpours. Central Florida, the Florida Panhandle, and the west coast are expected to see significant precipitation totals.
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Gusty Winds: Wind gusts up to 55 mph are possible within localized training rain bands.
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Watches & Warnings: The NHC has indicated that tropical storm watches or warnings could be issued for portions of the northern Gulf Coast, including Florida, Alabama, Mississippi, and Louisiana.
National Hurricane Center: Atmospheric Conditions & Strengthening
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Fuel Source: The system is spinning over exceptionally warm Gulf waters, which provide the thermal energy needed for deep thunderstorm organization.
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Wind Shear: The system currently faces modest wind shear in the northern Gulf. However, as it drifts west-northwestward into areas of lower shear, conditions will become more favorable for further intensification into Tropical Storm Bertha.
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Reconnaissance: An Air Force Reserve Hurricane Hunter aircraft is officially scheduled to fly directly into the center of the storm to locate a closed surface circulation and measure exact wind speeds.
National Hurricane Center: Targeted Rainfall & Flood Risks
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Tampa & West Coast: Already receiving heavy rain, coastal regions from the Tampa Bay area up through the Big Bend are forecast to pick up 6 to 8 inches of rain over the next few days.
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Panhandle & Central Florida Shift: Spaghetti models have consolidated on a westward-drifting track. This shifts the core flood risk away from inland Central Florida (Orlando) and aims it squarely at the Florida Panhandle and coastal Alabama and Mississippi.
National Hurricane Center: Tax-Free Hurricane Supplies
For those in Florida purchasing last-minute items, remember that the state permanently eliminated sales tax on specific storm readiness items. You can buy tax-free essentials including bottled water, first aid kits, fuel cans, and weather radios.