TAMPA, Fla. (WFLA)— Hurricane Erin is expected to become post-tropical by tonight but will remain a powerful hurricane-force low-pressure system through the weekend, the National Hurricane Center said.

Erin is located about 435 miles north of Bermuda and is moving toward the northeast at about 22 mph.

A turn toward the east-northeast with an increase in forward speed is expected today before Erin turns back to the northeast on Sunday, the NHC said.

Erin will pass the south of Atlantic Canada today and then move across the north Atlantic waters.

Maximum sustained winds are near 90 mph.

There are no coastal watches or warnings in effect.

Leeward Islands

A tropical depression is likely to form this weekend as the system moves northwestward and then northward between the Lesser Antilles and Bermuda.

The tropical wave is located a couple of hundred miles east-northeast of the northern Leeward Islands, the NHC said.

The chance of formation in the next 48 hours is 70 percent.

The chance of formation in the next seven days is 80 percent.

Central Tropical Atlantic

A tropical wave located about a thousand miles west-southwest of the Cabo Verde Islands brings rain and thunderstorms.

According to the NHC, the system could become a tropical depression at any time, but the latest satellite-derived wind data indicate that the system does not have a well-defined circulation center.

The system is expected to move into a less conducive environment today through Saturday before reaching a potentially favorable environment again late this weekend and into the early next week.

According to the NHC, the system is expected to move westward at 10 to 15 mph over the central tropical Atlantic and approach the Lesser Antilles.

The chance of formation in the next 48 hours is 50 percent.

The chance of formation in the next seven days is 60 percent.

A small area of low pressure located southwest of the Azores is moving through a dry environment, producing occasional showers, the NHC said.

Development chances are decreasing.

The weak low is likely to dissipate over the next day or so as it moves little, the NHC said.

The chance of formation in the next 48 hours is 10 percent.

The chance of formation in the next seven days is 10 percent.