Tornado, thunderstorm warning for Auckland, Northland, Waikato, Coromandel The line of thunderstorms moved across northern NZ. Photo / MetService Tornado, thunderstorm warning for Auckland, Northland, Waikato, Coromandel Kiwis north of Hamilton could be hit with severe thunderstorms and a small tornado as wild weather thrashes the country. MetService announced a severe thunderstorm watch for Northland, Auckland, Great Barrier Island, the Coromandel Peninsula and Waikato this afternoon. Update: The greatest risk of severe thunderstorms is now for the Coromandel and Great Barrier Island. The line of thunderstorms has mostly moved across northern NZ, but the Severe Thunderstorm Watch area has been extended to include the Coromandel Peninsula until 4:30pm. ^Dan pic.twitter.com/QJDy1HGR4K— MetService (@MetService) July 18, 2021