An unstable westerly flow over the northern North Island gradually eases, while cooler southerlies strengthen over central New Zealand. There is a low risk of thunderstorms about eastern Bay of Plenty and the ranges of of Gisborne/Tairawhiti this morning. There is also a low risk of thunderstorms for Great Barrier Island, Auckland, Coromandel Peninsula, Waikato, Waitomo, Taumarunui, Taranaki, Whanganui, Taihape, Manawatu, Horowhenua, Kapiti Coast, Hawke's Bay and the Tararua District, although the risk becomes minimal from Taranaki and Taumarunui southwards this evening, as depicted on the chart. In addition, although not depicted on the chart, there is a low risk of thunderstorms at the Chatham Islands until late afternoon. No thunderstorms or significant convection expected elsewhere in New Zealand today.

A showery westerly flow continues over the northern North Island. There is a low risk of thunderstorms for Auckland, and near the west coast of Waikato and Waitomo, although the risk for Waitomo is only before dawn, as drawn on the chart. No thunderstorms or significant convection expected elsewhere in New Zealand during Saturday morning.

The unstable westerly flow over northern New Zealand eases. Meanwhile, a trough that is followed by a change to easterly winds moves slowly northwards onto the Coromandel Peninsula and Waikato. This increases the shower activity, especially about the Coromandel Peninsula. Throughout the latter half of Saturday there is a low risk of thunderstorms about Coromandel Peninsula. There is also a low risk of thunderstorms during the afternoon and evening for the west of Northland south of Dargaville, Great Barrier Island, Auckland, and Waikato. No thunderstorms or significant convection expected elsewhere in New Zealand during this period.