An active cold front is expected to move over the far south of the South Island from the south Tasman Sea overnight tonight, then across the country tomorrow ( Tuesday)
North Island, heavy rain in the west, but showers later.Thunderstorms possible. Showers in the east with a southerly change. South Island, showers, with thunderstorms possible in the west and south at first. Snow to 600 metres in the south. Mainly fine for Nelson, and inland Marlborough and Canterbury.
North Island, showers in the west becoming frequent, possible thunderstorms in southwest. Mostly dry in the east. Severe gale westerlies possible about Hawkes Bay and Wairarapa. South Island, heavy rain in the west, possibly thundery. Mostly dry elsewhere, brief rain for Otago and Southland. Gale westerlies possible in exposed places.
North Island, showers, heavy in the west. South Island, showers with cold southerlies, clearing in the west and north. Snow to 500 metres in the far south.
Periods of rain. Westerlies strong at times, with gale possible on Friday.
Occasional showers, some heavy especially tomorrow.
Mainly fine. Northwest gales in exposed places tomorrow night.
Long fine spells, but a few showers as well. Heavy rain developing tomorrow night, with squally thunderstorms about Taranaki and south of Levin. Northwest gales later tomorrow, possibly severe in Wellington.
Fine today. Rain or showers tomorrow, with possible thunderstorms in the north and west. Northwest gales tomorrow, severe in exposed places.
A few showers today. Rain tomorrow, heavy at times, with possible thunderstorms.
Fine today, apart from a few showers about coastal Southland. Occasional rain or showers tomorrow, with northwest gales in exposed places during the morning.
Occasional rain, clearing this evening. Showers tomorrow.
Northwest 25 knots, easing to 15 knots this afternoon, and rising to 30 knots from late Tuesday afternoon. Rough sea, easing for a time. Northwest swell 1 metre at times. Fair visibility in a few showers, mainly overnight tonight and Tuesday morning.
Outlook following 3 days: Rising Wednesday morning northwest 35 knots with very rough sea, changing Wednesday afternoon southwest 30 knots. Tending Thursday northwest 25 knots,changing late Friday southwest 30 knots. Moderate northerly swell developing Wednesday, easing Thursday.
Inshore waters from Great Mercury Island to Mayor Island to Matakana Island.
Several fronts cross over New Zealand during this forecast period, embedded in a disturbed westerly flow. These westerlies are likely to reach gale or possibly storm in many places on Thursday.
NIL warning for PLENTY
Strong wind advisory. Monday: Northwest 15 knots, easing to 10 knots south of Slipper Island this evening. Sea slight. Mainly fine, but fair visibility in possible shower or two. Tuesday: Becoming northwest 15 knots everywhere in the morning, rising to northerly 25 knots gusting 35 knots from late afternoon, and 30 knots gusting 40 knots in the north in the evening. Sea becoming rough from late afternoon. Poor visibility in a few morning showers, then fine spells and isolated showers.
Outlook until midnight Friday: Wednesday: Becoming westerly 20 knots in the morning. Showers becoming frequent, with possible heavy falls and thunderstorms. Thursday: Westerly 20 knots, rising to 25 knots in the north in the evening. Occasional showers. Friday: Westerly rising to 25 knots everywhere in the afternoon. Showers, some possibly heavy.
Swell forecast to midnight Friday: North to northeast half a metre, rising to northerly 1 metre for a time Wednesday.