Northland to Waitomo, including Coromandel, and Bay of Plenty

Showers, heavy with hail and possible thunderstorms, clearing tomorrow apart from isolated afternoon and evening showers south of Auckland.

Gisborne, Hawkes Bay

Fine apart from showers, mainly about the ranges, with possible thunderstorms and hail.

Taranaki to Wellington, including Wairarapa

Showers, heavy with possible hail and thunder mainly about the ranges, clearing everywhere apart from Wellington and Wairarapa tomorrow.

Marlborough, Nelson, Buller, northern Westland

Fine, but a few afternoon and evening showers inland, heavy with possible thunderstorms and hail. Fine tomorrow apart from a few showers in Marlborough, and inland elsewhere.

Remainder of Westland, Fiordland

Fine, but isolated afternoon and evening showers inland tomorrow.

Canterbury

Occasional showers, mainly south of the Banks Peninsula.

Otago and Southland

Rain spreading from the east today, then gradually clearing tomorrow.

Chatham Islands

Showers today. Fine spells tomorrow.

Colville

Northwest 25 knots, easing to 15 knots Thursday morning, then becoming southwest 15 knots Thursday afternoon. Rough sea, easing. Northeast swell 1 metre, easing. Northwest swell 1 metre developing. Poor visibility in showers with possible thunderstorms, clearing Thursday morning.

Outlook following 3 days: Becoming Friday afternoon northwest 15 knots, rising for a time early Saturday 25 knots. Rising Sunday northwest 30 knots. Sea becoming rough.

Kaipara

Northwest 25 knots, easing to 15 knots south of Hokianga Harbour this afternoon. Becoming southwest 10 knots everywhere Thursday afternoon. Rough sea, easing. Southwest swell 2 metres, easing. Northwest swell 2 metres, developing. Poor visibility in showers with possible thunderstorms, clearing Thursday morning.

Outlook following 3 days: Becoming Friday morning northerly 15 knots, rising Friday evening 30 knots, easing early Saturday 15 knots,rising Sunday 30 knots. Sea becoming rough at times.Moderate northwest swell.

Auckland

Manukau and Waitemata Harbours, Hauraki Gulf and Bream Head to Cape Colville.

Situation
A broad complex trough with several associated lows and fronts affects the country through to Thursday. A brief, narrow ridge passes over the country later Thursday and during Friday, then a front moves over the area late Friday.

Warning
Strong wind advisory in force for the Hauraki Gulf and the area from Bream Head to Cape Colville.

Forecast
For the Manukau and Waitemata Harbours: Wednesday: Northwest 15 knots easing to 10 knots this evening. Sea slight. Poor visibility in showers and possible thunderstorms, easing this evening. Thursday: Changing southwest 15 knots in the morning, easing to 10 knots in the evening. Sea slight. Poor visibility in showers and possible thunderstorms, clearing afternoon then fine. For the Hauraki Gulf and the area from Bream Head to Cape Colville: Wednesday: Northwest 20 knots, rising to 25 knots gusting 35 knots at times this afternoon, easing to 15 knots this evening. Sea becoming rough at times this afternoon. Poor visibility in showers and possible thunderstorms, easing this evening. Thursday: Northwest 15 knots, changing southwest 15 knots around midday, then easing to 10 knots in the evening. Sea slight. Poor visibility in showers and possible thunderstorms, clearing afternoon then fine.

Outlook
Outlook until midnight Sunday: Friday: Becoming northerly 10 knots in the morning, rising to 15 knots in the afternoon. Rain developing from afternoon, chance thunderstorm. Saturday: Northerly 15 knots, rising to 20 knots for a time. Rain easing. Sunday: Rising to northwest 20 knots. Rain, with some heavy falls, easing late.

Swell
Swell forecast to midnight Sunday: East Coast: Northeast 1 metre, easing to half a metre or less Thursday, rising to 1 metre Sunday. West Coast: Southwest 2 metres, easing to 1.5 metres Thursday, and to 1 metre Friday. Northwest 1 metre developing Saturday, rising to 1.5 metres Sunday.