Cyclone Tam started as a tropical depression on April 13th 500km to the north east of Vanuatu, a tropical low was given the name 98P soon after by JTWC. A low wind shear environment over the next couple of days allowed the low to improve its structure and was named as a Tropical cyclone 30P by JTWC on 15 April, then soon after by Fiji Met Service as 'Tam'. 

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Tam was a Category 1 tropical cyclone for less than 24 hours with the system exiting the tropics in the morning of 16 April. Tam transitioned to a sub-tropical storm during the same day and continued to rapidly head southward near Norfolk Island and arrived in New Zealand NW of Northland late on 16 April. Tam travel speed reduced due to the high pressure system to the east of NZ which meant a prolonged vigorous north-easterly flow with heavy rain across the far north of the upper North Island during the 16th and 17th April. 

 

Cyclone Tam became a mature deep extratropical cyclone over the central Tasman during the 17th, causing power outages, tree and building damage, flooding and slips across the upper North Island. The system slowly weakened during 18th to 20th causing flash flooding damage in Auckland's southern suburbs from thunderstorm clusters within its outer spiral rainbands.

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