Tropical cyclone Alison developed from a tropical disturbance half way between Fiji and Vanuatu on 4 March 1975. Alison moved over west and over Vanuatu as a category 1 before rapidly intensifying to become a severe category 4 tropical cyclone to the north west of New Caledonia. Alison struck New Caledonia on 8 March 1975 with pressure down around the high 940's hPa. Alison then was steered by the subtropical ridge southward into the Northern Tasman on 9 March and began to transition into a extratropical cyclone later that day heading towards New Zealand. 

 

Alison moved to the west of the Upper North Island on 11 March as a strong category 2 extratropical cyclone and battered Northland, Great Barrier, Coromandel Peninsula and Auckland. It was the largest storm to hit Auckland in 15 years with winds gusting up to 130km/h in the Hauraki Gulf and 100 to 170mm of rain falling on parts of the region. Flooding, winds damage and slips were the main impacts of the cyclone. 

 

 

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