Heavy rain, thunder and lightning are all possibilities for Bay of Plenty this week.
MetService has a heavy rain watch in place for Bay of Plenty east of Ōpōtiki.
In a statement, MetService said a front, preceded by a humid and unstable northwesterly flow, moves northeastwards over the South Islandthis afternoon then slowly eastwards over the North Island during Thursday.
A period of heavy rain is likely for northern and western regions ahead of the front, with thunderstorms and localised downpours also possible in some places.
MetService meteorologist Ashlee Parkes described today and tomorrow as "busy weather days" across the Bay of Plenty.
"Once these fronts pass through, calmer conditions are expected through into the weekend," she said.
"Today we are expecting showers across the region, some heavy with possible thunderstorms, mainly from afternoon.
"Tomorrow, rain develops with this second approaching front in the morning, heavy with possible thunderstorms, which ease in the evening as winds turn from the northwest to southwest.