April 4 edit
1929: Severe floods began in parts of Tasmania, eventually killing 22 people.
1977: An F5 tornado killed 22 people near Birmingham, Alabama.
1978: Cyclone Alby, the most damaging tropical cyclone to impact Western Australia on record, brought widespread damage to homes and crops and wind gusts as high as 150 kilometres per hour (93 mph) in Albany.
1981: A violent tornado formed from an unusually weak storm in West Bend, Wisconsin. No tornado warning was issued due to the seemingly weak nature of the storm, and three people were killed.
2003: Cyclone Inigo reached its peak intensity of 900 millibars (26.58 inHg) north of Onslow, Western Australia, tying it for the most intense tropical cyclone on record in the Australian tropical cyclone region.