A severe storm moved across the Blue Mountains and into Sydney, northern suburbs and beaches on the 20 November 1994 resulting in considerable damage. Trees were uprooted, houses and cars damaged, powerlines fell and some buildings collapsed. Thousands of houses lost power. Two injuries reportedly occurred during the storm and two people drowned on the Harbour in strong winds when their sailing skiff capsized.

The storm moved into western Sydney and while the impact was not as severe as in the north, power was lost to thousands of homes and rail services were cut in some areas. Property damage was also reported from rural areas including Narromine and Dubbo where wind gusts were recorded up to 139 km per hour.

The Insurance Council of Australia estimated the 1994 damage at $29 million, with the 2017 estimated normalised cost of $127.6 million.