List of storms named Jack

The name Jack has been used for four tropical cyclones worldwide, two in the Western Pacific ocean, one in the South-West Indian ocean, and one in the Australian Region.
In the Western Pacific:

Typhoon Jack (1989) – a late-season category 4 typhoon that affected Guam
Tropical Depression Jack (1993) – weak system that stayed at sea

In the South-West Indian Ocean:

Cyclone Jack (1977) – crossed over from the Australian basin but never impacted land

In the Australian Region:

Cyclone Jack (2014) – never impacted land