Hurricanes Isaac, Joyce move in Atlantic with no threats to land

Sept. 25 (UPI) -- With Helene dissipating on Friday, the National Hurricane Center is tracking two hurricanes in the Atlantic Ocean that are not a threat to land: Isaac and Joyce.

Hurricane Isaac was about 645 miles west-northwest of the Azores, packing maximum sustained winds of 100 mph. Isaac was moving northeast with winds of 18 mph, NHC said in the 9 p.m. GMT update .

No coastal watches or warnings are in effect.

Hurricane-force winds extend up to 45 miles from the center and tropical-storm-force winds extend outward up to 195 miles.

Isaac gradual weakening is projected and is expected to become a post-tropical cyclone Monday.

Joyce is south of Isaac about 1,080 miles east of the Northern Leeward Islands with maximum sustained winds of 45 mph. Joyce is moving northwest at 9 mph in the 5 p.m. AST update .

No coastal watches or warnings are in effect. Tropical-storm-force winds extend outward up to 105 miles from the center.

Weakening is forecast weaken, and could degenerate into a remnant low by early Tuesday, NHC said.

In the north Atlantic there are two disturbances.

A tropical wave is producing disorganized showers and thunderstorms near and to the west of the Cabo Verde Islands.

A tropical depression will likely form during early or middle of next week while the system moves toward the west and then northwest, the NHC said.

Formation chance through 48 hours is 30% and through seven days is 70%, according to the 2 p.m. EDT update .

An area of low pressure could form over the western Caribbean Sea in a few days. A tropical depression could form during the middle part of next week as the system enters the Gulf of Mexico, NHC said.

Formation chance through 48 hours is 0% and through seven days is 50%, according to the 2 p.m. EDT update.

Helene, which made landfall in northwest Florida as a Category 4 storm with maximum sustained winds of 140 mph, became a remnant low as it moved through Kentucky and into Illinois.

There are 10 named storms in the Atlantic. The next one would be Kirk.