Tropical cyclones in 1999

The strongest tropical cyclone of the year was Gwenda, attaining maximum sustained winds of 120 knots (220 km/h; 140 mph) and a pressure of 900 hPa (26.58 inHg), later tied with Inigo in 2003.

Floyd was the costliest tropical cyclone of the year, with around $6.5 billion worth of damages as it affected the Bahamas, the East Coast of the United States, and the Atlantic Canada.

The accumulated cyclone energy (ACE) index for the 1999 (seven basins combined), as calculated by Colorado State University was 606.4 units.

A strong La Niña was present for the whole year, which made the Atlantic and North Pacific waters warmer than usual.

Localized or otherwise minor damage occurred from Hurricanes Bret, Gert, and Jose, Tropical Storms Harvey and Katrina.

Flooding from Floyd in North Carolina followed Hurricane Dennis, a slow and erratic–moving storm that dropped heavy rainfall in the eastern portion of the state.

Tropical Depression Eleven in October contributed to extreme flooding in Mexico, which left 636 people dead and caused $491.3 million in damage, though impact could not be distinguished from the storm itself.

Hurricane Irene caused extensive flooding in Cuba and Florida, with lesser effects in the Bahamas and North Carolina.

Bart reached "super typhoon" status on September 22, when it grew to comprise winds containing a force of 260 km/h (160 mph).

In October, two very intense cyclones struck eastern India within two weeks of each other, leaving over 10,000 people dead and causing more than $4.5 billion (1999 USD) in damages.

Activity began late, with the first tropical storm – Alda – forming on January 16, the third latest ever recorded at the time.

The strongest storm – Evrina – peaked as a strong cyclone in the Australian but weakened upon crossing 90°E, with 10-minute maximum sustained winds of 175 km/h (110 mph) in the basin.

Cyclone Astride originated toward the end of December, bringing rainfall and gusty winds to northern Madagascar while in the region.

The 1999 season started with Olinda forming on late January, exiting toward the South Pacific basin the next day.

Damien, Rona, Elaine, Vance, Frederick, and Gwenda further strengthened to severe tropical cyclones.