Hurricane Marco caused significant flooding in the Greater Antilles and Central America, despite remaining well offshore.

By November 19, the depression strengthened into Tropical Storm Marco, shortly before slowly curving in a general eastward direction.

Marco briefly became a hurricane on November 20, though upper-level winds caused it to weaken back to a tropical storm later that day.

Despite not making landfall, Marco produced heavy rainfall in Cuba, Hispaniola, Central America, and Jamaica, which caused significant flooding in some areas.

In Honduras, 4,000 homes were destroyed, 40 bridges washed away, nearly 50,000 acres of banana and fruit plantations flooded, and nine deaths were reported.

On November 9, a cold front moved into the northwest Caribbean Sea, shortly before an abnormally strong high-pressure system entered in the area.

The Intertropical Convergence Zone became active, causing monsoonal southwesterly flow to enter the system from the eastern Pacific Ocean.

Despite a well-defined low-level circulation, the system did not meet the criteria for a tropical cyclone because convective activity was not organized or concentrated within the vicinity of the center.

Several small, weak centers of low pressure formed in the general area, and the entire system drifted northward for a couple days.

In combination with a high-pressure area over the United States, the system produced gale-force winds on Florida, Cuba, the Bahamas and the Gulf of Mexico.

Simultaneously, Marco attained its peak intensity with maximum sustained winds of 75 mph (120 km/h) and a minimum barometric pressure of 983 mbar (29.0 inHg).

[1] Three hours later, the National Hurricane Center issued its final advisory on Marco, stating that the storm was merely a low-level swirl devoid of deep convection.

In addition, a tropical storm warning was issued on November 25 for the Isle of Youth and Pinar del Río, Cuba, though it was discontinued about 24 hours later.

[1] Although Hurricane Marco never made landfall, it was a large storm with an unusual and erratic path and as a result, caused heavy rainfall throughout Central America and the western Caribbean nations.

[7] Marco also contributed to an ongoing flood in Jamaica, which had already caused a total of $3 million in damage to roads and left 170 families without shelter.

Further north, severe beach erosion caused the loss of as much as 10 feet (3.0 m) of the dune line in Brevard, Indian River, St. Lucie, and Martin counties.

After the storm, the Red Cross set up temporary shelters in San Pedro Sula, Puerto Cortés, and El Progreso.