Tropical Storm Isaac

The name Isaac has been used for five tropical cyclones in the Atlantic Ocean. After the retirement of Irene in the 2011 season, it is the only original "I" name that still remains on the lists since its first use.

• Tropical Storm Isaac (1988) – short-lived storm that had tropical storm force winds for only 18 hours, never threatened land.
• Hurricane Isaac (2000) – reached Category 4 strength, but stayed mostly in the open sea. It caused waves that capsized a boat near Long Island, drowning one person.
• Hurricane Isaac (2006) – Category 1, passed well east of Bermuda, became extratropical near Newfoundland.
• Hurricane Isaac (2012) – a destructive Category 1 hurricane, that hit Louisiana causing over $3 billion in damages.
• Hurricane Isaac (2018) – a minimal hurricane that passed through the Lesser Antilles and dissipated in the eastern Caribbean Sea.

The name Isaac has also been used for one tropical cyclone in the southwestern Pacific Ocean.

• Cyclone Isaac (1982) – struck Tonga.