Tropical Storm Fernand forms. Hurricane center also tracking Invest AL99 and 3 tropical waves

(This story has been updated to include information about Tropical Storm Fernand, Invest AL99 and tropical waves.)

Fernand has formed.

Almost three months after the start of hurricane season, systems are churning in the tropics, including Tropical Storm Fernand, which formed south-southeast of Bermuda. Experts are monitoring other weather systems not long after Hurricane Erin, once a Category 5 out in the Atlantic, dwindled. Like Erin, Fernand is expected to stay over open water, according to forecasters.

The 5 p.m. Saturday, Aug. 23, 2025, tropical outlook from the National Hurricane Center in Miami, Florida, shows Tropical Storm Fernand and another disturbance with chance of formation.

Invest AL99 − “invest” is short for “investigation” − currently are swirling in the Atlantic. The live weather radars below show conditions for potential rain, flash flood and other warnings.

➤ 2025 Atlantic hurricane season predictions

Atlantic hurricane season is from June 1 to Nov. 30 every year, with the most activity between August and October. Should another weather system develop into a tropical storm, the system would be named Gabrielle, which is next on the list of the 2025 Atlantic hurricane season names (see below).

In addition, the hurricane center is tracking three tropical waves in the Caribbean. Each are moving west and do not pose a threat at this time.

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Keep reading for information about tropical storm activity for Aug. 23, 2025.

National Hurricane Center in Miami, Florida, forecast on tropical activity: Is there a tropical storm or hurricane now?

According to the 5 p.m. Saturday, Aug. 23, 2025, tropical outlook from the National Hurricane Center in Miami, Florida, Tropical Storm Fernand formed, the sixth-named storm in this hurricane season. There also is a disturbance that has a chance of formation in the next few days.

Tropical Storm Fernand was about 405 miles south-southeast of Bermuda with maximum sustained winds of 40 mph. At the time of the advisory, Fernand was moving north at 15 mph.

A north-northeastward motion at a gradually increasing forward speed is anticipated during the next couple of days, followed by a turn to the northeast. On the forecast track, Fernand should move well east of Bermuda and across the open waters of the subtropical North Atlantic.

There are no coastal watches or warnings in effect.

Satellite data indicate that the maximum sustained winds are near 40 mph with higher gusts. Some strengthening is forecast during the next 48 hours, and Fernand could be near hurricane strength on Monday.  Weakening is expected to begin on Tuesday.

Tropical-storm-force winds extend outward up to 105 miles.

Invest AL99, east of the Windward Islands, marked “yellow” in the graphic above:

Showers and thunderstorms continue in association with a tropical  wave located about 650 miles east of the Windward Islands. Some development of this system could occur during the next couple of days while the system moves quickly westward at about 20 to 25 mph.

Locally heavy rainfall and gusty winds are possible across portions of the Windward Islands as the system moves through on Sunday and Monday. By Tuesday, conditions over the central Caribbean are expected to be unfavorable for further development.

• Formation chance through 48 hours is low at 20 percent.

• Formation chance through 7 days is low at 20 percent.

In addition to Tropical Storm Fernand and Invest AL99, the National Hurricane Center is tracking three tropical waves in the Atlantic. Each are moving west and do not pose a threat at this time. However, experts say to be prepared for hurricane season.

Tropical waves in the Atlantic:

• An eastern Atlantic tropical wave is passing through the western Cabo Verde Islands. The wave is moving westward. No significant convection is noted with the tropical wave at this time.

• A central Atlantic tropical wave near Invest AL99 is moving west. AL99 has a low chance of developing into a tropical cyclone through the next 48 hours.

• An eastern Caribbean tropical wave is near the Mona Passage, and moving westward. Visible satellite imagery indicates that the wave envelope is large and extends across most of the eastern and central Caribbean, where scattered showers and tstorms are evident.

A tropical wave previously analyzed in the far western Caribbean has moved inland over Central America.

The USA TODAY Network in Florida will produce daily tropics watch advisories.

The Atlantic basin consists of the northern Atlantic, Caribbean Sea and Gulf of America. NOAA changed its naming convention for the Gulf of Mexico after the U.S. Geological Survey changed the name on U.S. maps per President Trump’s order.

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Contributing: Cheryl McCloud, USA TODAY Network-Florida

This article originally appeared on Treasure Coast Newspapers: Hurricane center in Florida tracks Tropical Storm Fernand, AL99 path