Hurricane Melissa is forecast to make landfall on Jamaica -- likely as a Category 5 storm -- close to midday or in the early afternoon of Tuesday, depending on the speed at which it churns northeast towards the island.

Hurricane-force winds, extending 30 miles from the eye, will begin in western Jamaica by around 8 a.m. ET and end by around 6 p.m. ET.

Most wind damage is expected to occur in the western portion of the island. The capital, Kingston, will not see hurricane-force winds at any point, but will rather experience tropical storm-force conditions.

The worst storm surge is also expected on the western half of the island, where 9 to 13 feet of surge will inundate the coast. Kingston will also experience storm surge, but will escape the worst.

On the northwest side of the island, likely west of where the storm's eye will pass, the Montego Bay area could see 2 to 4 feet of storm surge above ground level.

Heavy rain will affect the entire island with catastrophic flash flooding and landslides likely. Totals of 15 to 30 inches of rain are expected across the island, with some areas seeing up to 40 inches.

Southeast Cuba will feel hurricane-force wind from late on Tuesday through Wednesday morning. This will be accompanied by 7 to 11 feet of storm surge, up to 25 inches of rainfall with potentially catastrophic flash flooding and numerous landslides.

The southeast Bahamas and the Turks and Caicos Islands will feel Melissa as a hurricane throughout Wednesday, with 4 to 6 feet of storm surge expected plus some 5 to 10 inches of rainfall.

Melissa will still be a hurricane passing near Bermuda on Friday morning.

The U.S. East Coast will see rough surf, rip currents and possible beach erosion this week.

-ABC News' Kenton Gewecke

The National Hurricane Center's latest bulletin said it expects Hurricane Melissa to bring "catastrophic winds, flash flooding and storm surge" for Jamaica when it approaches the island and makes landfall on Tuesday.

Conditions are "deteriorating on Jamaica as extremely dangerous Category 5 Melissa slowly approaches," the NHC said.

"Preparations to protect life and property should be complete in Jamaica and rushed to completion in Cuba," it added.

Sustained winds are currently nearing 175 mph with higher gusts, the NHC said. "Some fluctuations in intensity are likely before Melissa makes landfall on Jamaica later today," it added.

"However, Melissa is expected to reach Jamaica and southeastern Cuba as an extremely dangerous major hurricane, and it will still be at hurricane strength when it moves across the southeastern Bahamas," the bulletin warned.

The Jamaican Defence Force has been deployed to assist in hurricane preparedness, the force said in social media posts as Hurricane Melissa approaches the island, with the JDF warning of the storm's projected "devastating impact."

"Relief supplies will be desperately needed across the island in the aftermath of the hurricane," the JDF said in a post to X. "The JDF will be integral in the recovery effort."

The National Hurricane Center said in a bulletin early Tuesday that Hurricane Melissa "is expected to reach Jamaica and southeastern Cuba as an extremely dangerous major hurricane, and will still be at hurricane strength when it moves across the southeastern Bahamas."

Melissa is expected to move across Jamaica on Tuesday, reach southeastern Cuba by Wednesday morning and the southeastern or central Bahamas later on Wednesday, the NHC said.

U.S. Air Force "Hurricane Hunters" data indicated that maximum sustained winds are nearing 175 mph, with higher gusts, the NHC said. Hurricane force winds are extending up to 30 miles from the storm's center, the NHC added.