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Hurricane Season 2023

Tropical Storm Idalia has formed and is expected to strengthen as it tracks towards Florida

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At a Glance

  • Tropical Storm Idalia has developed near the Yucatan Peninsula.
  • After lingering near Cancun, it will move north into the Gulf of Mexico.
  • Idalia is forecast to become a hurricane before making landfall along Florida's Gulf Coast by Wednesday.
  • Flooding rain, strong winds, high surf, coastal flooding and some tornadoes are possible.
  • It will spread heavy rain and winds into parts of the Southeast.

Tropical Storm Idalia is organizing and has developed in the Caribbean Sea, near the Yucatan Peninsula. Idalia is forecast to strengthen early this week as it moves northward through the Gulf of Mexico.

It is expected to make landfall in Florida as a hurricane with heavy rain, storm surge flooding, and high winds midweek.

What is the latest on Idalia? The system was named Tropical Depression Ten late Saturday afternoon and strengthened into Tropical Storm Idalia late Sunday morning.

It is moving slowly near Cancún and will remain in the area until Monday. Heavy rain extends from Mexico's Yucatan Peninsula to western Cuba.

Current Satellite
 
Watches and warnings are in effect: Tropical storm warnings are in effect for Mexico's northeast Yucatan Peninsula, including both Cancún and Cozumel. This means tropical storm conditions are expected in these areas.

A​ tropical storm warning is in effect for western Cuba's Pinar del Rio, while a watch is in effect for the Isle of Youth, where tropical storm conditions are possible.

Current Storm Status And Forecast Path

(The red-shaded area denotes the potential path of the center of the tropical cyclone. It's important to note that impacts (particularly heavy rain, high surf, coastal flooding, winds) with any tropical cyclone usually spread beyond its forecast path. )
 

What is its future in the Gulf? The latest data suggest Idalia should finally begin moving north by either late Monday or early Tuesday.

On that track, its center could arrive somewhere along Florida's Gulf Coast on Wednesday. After that, most computer models suggest it would take a bend, tracking through Georgia and the Carolinas through Thursday or early Friday.

imageComputer Model Forecast Tracks
(The lines on this graphic represent several of the many track forecasts from various computer models. This is not an official forecast, but these are used as guidance for creating the projected path.)
 
How strong could Idalia become? Gulf of Mexico water remains very warm, even by late August standards, and the recent Tropical Storm Harold did little to cool the Gulf, particularly in the path of Idalia.
I​dalia may also get a boost from its track over the Gulf of Mexico loop current, a northward flowing ribbon of deeper, warmer from the western Caribbean Sea into the southeastern Gulf of Mexico.

All other factors equal warmer water can provide more fuel for a tropical storm or hurricane to intensify.

Furthermore, recent computer models suggest wind shear during its northward journey toward Florida may be lower than previously forecast. Wind shear is usually a hostile factor that can weaken or slow a storm's intensification.

Therefore, the National Hurricane Center is forecasting Idalia to become a Category 1 hurricane, possibly stronger, before its Florida landfall. The National Hurricane Center also noted in its Sunday morning discussion that "There's a notable risk of rapid intensification while the system moves across the record warm eastern and northeastern Gulf of Mexico."

imageForecast Path And Ocean Heat Content
(This map shows areas of not only warm water but warm, deep water that is one ingredient to fuel developing and active tropical cyclones. The forecast path of the tropical cyclone is shown as a red outline, with the system's current location denoted by the symbol.)
 
Potential impacts in Florida and the Southeast: Some bands of soaking rain could reach parts of western Florida as soon as Monday. Locally heavy rain is also possible in parts of the Southeast not associated with Idalia this weekend into Monday.

Heavier rain appears to begin sometime Tuesday, continuing into Thursday from Florida into parts of Alabama, Georgia, and the Carolinas. That will likely trigger local flash flooding in some areas.

Three to six inches of rainfall, with totals up to 10 inches, are possible for parts of the west coast of Florida, the Florida Panhandle, and southern Georgia from Tuesday into Wednesday, according to the National Hurricane Center.

Any damaging wind or coastal flooding/storm surge impacts will depend on Idalia's strength and track, but those are uncertain factors this far out. That said, Florida's Gulf Coast is very prone to storm surge, even for modest hurricanes and tropical storms.

Rainfall Forecast

(This should be interpreted as a broad outlook of where the heaviest rain may fall and may shift based on the forecast path of the tropical cyclone. Higher amounts may occur where bands of rain stall over a period of a few hours. This also includes some rain that may fall apart from the storm in the Southeast. )
 
M​ore detailed information should be available in the next few days.

The best course of action for now is to stay up to date on the latest forecast changes and review and ready your hurricane preparation plans.

Weather.com, Hurricane Season 2023, Tropical Storm Idalia, Florida, Gulf Coast, Gulf of Mexico