Update: Wave finally becomes tropical depression, expected to strengthen

The track of Tropical Depression Nine. (NHC)

The track of Tropical Depression Nine. (NHC)

Update, 5:15 p.m.: After several days of worry, Invest 99-L, the tropical wave which kept threatening to develop and affect our area, finally became Tropical Depression Nine as of 5 p.m. today.

TD 9, which if it becomes a tropical storm would be named either Hermine or Ian (depending on what happens with Tropical Depression Eight), is 100 kilometers south of Key West with maximum sustained winds of 35 mph, according to the National Hurricane Center.

Follow the storm’s potential paths on our tracking map.

The storm is expected to move out of the Florida Keys into the Gulf of Mexico tonight. It is moving at 9 mph in a westerly direction. On Monday, that track is expected to take a northwest turn, and it’s expected to become a tropical storm.

Computer models from there vary in the storm’s fate — some have it continuing west into Texas, but many, including the National Hurricane Center’s 5-day forecast cone, predict it may take a sharp right back into the Big Bend of Florida.

Tropical Depression Eight formed earlier today off the North Carolina coast. It’s expected to strengthen into a tropical storm as well, heading west close to the Outer Banks before taking a sharp turn northeast, according to the hurricane center’s forecast cone.

Update 2 p.m.: In an afternoon update, the National Hurricane Center gave the tropical wave a 60 percent chance for development in the next 48 hours and an 80 percent chance in the next five days.

Check The Palm Beach Post radar map.

The system is expected to move west into the southeastern Gulf of Mexico on Monday, which will give it better conditions to develop into a tropical depression within the next few days. It is then forecast to move northeast over the eastern Gulf of Mexico later in the week.

afternoon update

The National Hurricane Center gives the tropical wave a 60 percent chance for development in the next 48 hours.

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Heavy rainfall and gusty winds are still likely to sweep over parts of South Florida through Monday.

The National Weather Service still gives Palm Beach County a 60 percent chance for thunderstorms and showers tomorrow.

Original post: A morning report from the National Weather Service says the estimated rainfall for South Florida has been greatly reduced for the next three days.

Monday and Tuesday are forecast to be the biggest days for rain, but the chance for local flooding and high wind gusts are low. The highest estimated amount of rainfall is now 3.5 inches along the far southern tip of Florida.

The average total rain expected for South Florida in the next three days. (NOAA)

The average total rain expected for South Florida in the next three days. (NOAA)

Heavy rainfall and gusty winds are expected to move into South Florida and the Florida Keys around 2 p.m today. For Palm Beach County, the National Weather Service says skies will be mostly cloudy and the chance of thunderstorms and showers is 60 percent. High temperatures will reach 89 degrees.

Tonight, the chance of showers remains the same and temperatures will drop to the mid-70s, but come Monday the chance of rain increases to 70 percent.

The National Hurricane Center still gives the weather system over Cuba a 40 percent of tropical formation in the next 48 hours and a 60 percent chance of formation through the next 5 days.

A NOAA Hurricane Hunter aircraft is scheduled to investigate the system this afternoon, the Hurricane Center reports.

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