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 15 knots, rising to 30 knots from Tuesday afternoon. Sea becoming rough. Northwest swell 1 metre at times. Fair visibility in a few showers,mainly Tuesday morning.
Outlook following 3 days: Rising Wednesday morning northwest 35 knots, changing Wednesday afternoon southwest 35 knots. Easing Thursday westerly 25 knots,rising late Friday southwest 35 knots. Very rough sea at times. Moderate northerly swell developing offshore Wednesday, easing Thursday.
Bay of Islands Recreational Marine Area.
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 BRETT
Strong wind advisory. Monday: Northwest 15 knots. Sea slight. Mainly fine, but fair visibility in one or two showers. Tuesday: Northwest 15 knots, rising to 20 knots north of Poor Knights Islands in the morning, to 25 knots gusting 35 knots in the afternoon, and to 30 knots gusting 40 knots late evening. Sea becoming rough in the afternoon. Fine spells, but fair visibility in a few showers.
Outlook until midnight Friday: Wednesday: Northwest 25kt, changing southwest 25 knots in the afternoon, easing to 15 knots in the evening. Showers becoming frequent, with possible heavy falls and thunderstorms. Thursday: Westerly 15 knots. Occasional showers. Friday: Rising to westerly 20 knots in the afternoon. Showers, some possibly heavy.