In March 2004, tropical cyclones Grace, Monty, Nicky, Fay, Oscar and Evan affected several regions of Australia. Wide spread flooding occurred in Queensland, Western Australia and the Northern Territory. Severe thunderstorms with high rainfall totals, flash flooding and hail were reported in most states over the course of the month. Damage to property, infrastructure and power supplies occurred.

A tropical low developed on 2 March and moved south-west bringing strong to gale force winds, large seas and heavy rain to south-east Queensland and northern New South Wales. Rainfall totals in several east coast locations was more than 200 mm in 24 hours. There were three fatalities associated with this event: one person drowned in Queensland and two people drowned in New South Wales.

In Western Australia, Cyclone Monty weakened as it neared the northern coast but brought with it widespread rainfall over the Pilbara causing significant flooding. In the Northern Territory, heavy rainfall associated with ex-tropical cyclone Evan affected the Arnhem, Darwin-Daly, Katherine and northern Victoria river districts, resulting in flooding in many catchments throughout the Top End. Residents were evacuated from flooded homes and businesses on the outskirts of Katherine on 4 March.