CHARLESTON, SC (WCSC) - Hurricane Matthew remains a Category 4 storm as it continues moving west after a brief upgrade to Category 5 strength Friday night.
The 11 p.m. update Sunday showed Matthew with 145 mph winds.
The storm was located 255 miles southeast of Kingston, Jamaica, moving northwest at 5 mph.
A Hurricane watch was issued for Jamaica earlier Saturday, which means that the storm could begin affecting the island within 48 hours.
Haiti, Dominican Republican and Cuba are also under hurricane watches.
The Government of the Bahamas issued a Hurricane Warning for the Southeastern Bahamas, and a Hurricane Watch for the Central Bahamas.
With maximum sustained winds at 150 mph, the storm would do significant damage upon landfall.
Some fluctuations in intensity are possible Saturday and Sunday. Matthew is expected to remain a powerful hurricane through Sunday.
Live 5 News Meteorologist Bill Walsh says Matthew is expected to curve northward during the weekend, and will likely be downgraded as it approaches the Bahamas early this week.
It is still too early to tell how Matthew might affect the Lowcountry.
Though the storm track has the storm moving north parallel to Florida's Atlantic coast, the National Hurricane Center reminds the public that there is a "significant spread in the model guidance beyond day three" and that storm tracking errors are anywhere from 180 miles to 240 miles.
A Hurricane Watch has been issued for the coast of Haiti from the southern border with the Dominican Republic to Le Mole St. Nicholas. A Hurricane Watch is in effect for Jamaica. The government of Colombia has discontinued the Tropical Storm Warning for that country.
The storm is expected to produce hazardous surf throughout portions of coastal Puerto Rico, Hispaniola, Aruba, Bonaire, Curacao, Venezuela, and Colombia over the next few days, as well as producing tropical storm-level wind and heavy rain over the warning areas.
The last major hurricane to form in the Atlantic basin was Hurricane Gaston, which became a major hurricane in the central Atlantic in August. It didn't make landfall or threaten the U.S. coast.
A Category 1 hurricane, Hermine hit the Florida panhandle on Sept. 2.