Mountain Radio

Latest South Island Weather Forecast

This forecast was transmitted by ZKIB BASE this evening on our 7.30pm voice call  to all of our field sets located in the South Island and Stewart Island.

  

Situation Statement

Issued: 10:23am Saturday

A ridge over central and northern New Zealand is receding northeastward. A cold front moves onto the south of the South Island from late Sunday morning, followed by a cooler southerly change.


Short Forecast

Issued: 1:19pm Saturday

Valid to: Midnight Sunday

Nelson and Marlborough

Fine, apart from isolated afternoon and evening showers about the ranges with possible thunderstorms.

Buller

Mainly fine today. A few showers tomorrow.

Canterbury, Otago and Southland

Fine today, apart from isolated showers inland. A period of rain spreading north tomorrow, heavy for a time with possible thunderstorms.

Westland and Fiordland

Patchy rain or drizzle today. A period of heavier rain spreading north tomorrow with thunderstorms.


Extended Brief Forecast

Issued: 10:50am Saturday

Monday

South Island, rain spreading north over northern areas, isolated showers elsewhere, gradually clearing.

Tuesday

South Island, a few showers, turning to rain in the south and east.

Wednesday

South Island, areas of morning cloud with a few showers in the north, then becoming mainly fine.


Brief Mountain Forecast

Issued at 12:33pm Saturday

Valid to Midnight Sunday

South Island

Kaikoura Ranges, also Kahurangi and Nelson Lakes National Parks:

Fine, apart from isolated afternoon and evening showers, some heavy with possible thunderstorms.

Southern Alps and Fiordland:

Patchy rain or drizzle. However, a period of heavy rain spreading north tomorrow with possible thunderstorms. WINDS: Northwesterlies, gale in exposed places about Fiordland, easing tomorrow afternoon.

Freezing Level: About 3600 metres, lowering to 2000 metres in the south tomorrow evening.


Extended Mountain Forecast

Issued at: 1:24pm Saturday

South Island

Monday:

Isolated showers in Fiordland and Mt Aspiring National Parks, elsewhere rain gradually easing to a few showers. Light winds at lower levels, westerlies about the tops.

Freezing Level: 3000 metres in the north, sloping to 1600 metres in the south.

Tuesday:

A period of rain spreading north, but only a few showers in Kahurangi National Park. Westerlies strengthening, changing gale or severe gale southwesterly.

Freezing Level: Rising to 3000 metres.

Wednesday:

Scattered rain in the north easing to isolated showers, cloudy periods elsewhere. Gale southwesterlies tending strong northwest about Fiordland.

Freezing Level: Above 3000 metres.


Nelson Lakes National Park

Tomorrow - Sunday

Issued at: 12:26pm Saturday

A cloudy start, then fine. However, becoming partly cloudy as afternoon and evening showers develop.

Freezing level 3600m

Monday

Rain easing to showers from morning.

Freezing level 3000m

Tuesday

Partly cloudy, isolated showers developing. Southwesterlies rising to gale.

Freezing level  Above 3000 metres.

Wednesday

Cloudy periods and isolated showers. Strong southwesterlies easing.

Freezing level  Above 3000 metres.


Canterbury High Country

Tomorrow

Issued at 11:32am Saturday

Cloud increasing. Showers from late morning, chance heavy with thunderstorms in eastern areas. Showers turning to rain from afternoon south of Tekapo.

Wind at 1000 metres: Northwest 45 km/h, changing southeast 30 km/h in the evening.

Wind at 2000 metres: Northwest 60 km/h, but gale 70 km/h in southern areas, easing to westerly 40 km/h everywhere in the evening.

Freezing level: Above 3000 metres.

Mon Dec 18

Rain clearing early and becoming fine, apart from isolated afternoon showers. Becoming partly cloudy in the evening.

Wind at 1000 metres: Light winds.

Wind at 2000 metres: Westerly 30 km/h, becoming light early morning. However, westerly 50 km/h developing from evening.

Freezing level: Above 3000 metres at first, then lowering to 2500 metres in the morning.

Tue Dec 19

Cloud increasing, late showers. Westerlies rising to gale, changing to strong southwesterlies.

Wed Dec 20

Cloudy with isolated showers at first, then becoming fine. Strong southwesterlies easing.


Westland Forecast

Issued at: 2:13pm 16 Dec

SUNDAY

Morning drizzle, then fine spells. Rain developing from afternoon, possibly heavy with thunderstorms. Rain clearing in southern areas in the evening. Northerlies at first,turning southerly from afternoon.

MONDAY

Early rain, then fine apart from afternoon isolated showers. Southwesterlies

TUESDAY

A few showers, turning to rain in the south. Southwesterlies.

WEDNESDAY

Cloudy with isolated showers at first, then becoming fine. Light winds.

THURSDAY

Becoming cloudy and showers developing. Northeasterlies turning southwesterly.


Southern Lakes

Tomorrow

Issued at 11:32am Saturday

Cloudy periods, rain developing in the morning, clearing in the evening.

Wind at 1000 metres: Northwest 45 km/h, turning southerly 30 km/h in the afternoon.

Wind at 2000 metres: Northwest gale 65 km/h, easing to westerly 40 km/h in the afternoon.

Freezing level: Above 3000 metres at first, then lowering to 2800 metres in the evening.

Mon Dec 18

A cloudy start, then fine, apart from isolated afternoon showers. Cloud returning in the evening.

Wind at 1000 metres: Light winds.

Wind at 2000 metres: Westerly 30 km/h, becoming light early morning. However, westerly 50 km/h developing from evening.

Freezing level: 2800 metres, lowering to 2500 metres in the morning.

Tue Dec 19

A period of rain about the headwaters, a few showers elsewhere. Strong westerlies easing and tending southerly.

Wed Dec 20

Fine with increasing high cloud. Winds tending northwesterly.


Mt Aspiring National Park

Tomorrow - Sunday

Issued at: 12:26pm Saturday

Rain, possibly heavy with thunderstorms, clearing in the evening. Snow to 3000 metres. Northwesterlies, rising to gale for a time.

Freezing level 3200m

Monday 18 December

Partly cloudy. Isolated afternoon showers. Westerlies, rising to gale in the evening.

Freezing level 2600m

Tuesday 19 December

Becoming cloudy, rain developing. Southwesterlies rising to severe gale.

Freezing level  Rising above 3500 metres.

Wednesday 20 December

Cloudy at first, then fine. Gale southerlies about the tops easing, light winds at lower levels.

Freezing level  Above 3500 metres.


Fiordland National Park

Tomorrow - Sunday

Issued at: 12:26pm Saturday

Rain, possibly heavy with thunderstorms. Rain clearing from afternoon. Gale northwesterlies, easing in the evening. Freezing level lowering to 1800 metres in the south at night.

Freezing level  3100m

Monday 18 December

Issued at: 12:26pm Saturday

Partly cloudy. Isolated afternoon showers. Westerlies, rising to gale from evening. Freezing level 1600 metres in the south.

Freezing level 2400m

Tuesday 19 December

Rain developing during the morning, with heavy falls possible, then clearing in the evening. Westerlies rising to gale, changing lighter southwest.

Freezing level  Rising above 3000 metres.

Wednesday 20 December

Fine at first. Cloud increasing and rain developing later. Winds turning northwest and rising to gale.

Freezing level  Above 3000 metres.


Southland Forecast

Issued at: 2:13pm 16 Dec

SUNDAY

Periods of rain, chance heavy with thunderstorms for northern areas. Rain clearing during the afternoon. Northerlies, turning southerly in the morning.

MONDAY

Cloudy with isolated showers, clearing and becoming mainly fine, apart from

Showers

TUESDAY

Rain developing in the morning with a change to southwesterlies,then easing to a few showers.

WEDNESDAY

Fine with increasing high cloud. Northeasterlies developing.

THURSDAY

A period of rain. Northerlies changing southwesterly.


Foveaux

Valid to Midnight Sunday

Issued at 12:55pm Saturday

Forecast:

Northeast 15 knots, easing to variable 10 knots this evening. Northwest 15 knots developing early Sunday morning, then changing southwest 20 knots about midday Sunday. Sea becoming moderate. Southwest swell rising to 2 metres. Northeast swell 1 metre dying out. Possible areas of fog offshore east of the Strait late this evening and Sunday morning.

Three Day Outlook:

Southwest 15 knots, rising overnight Monday northwest 25 knots. Changing Tuesday morning southwest 30 knots, then gradually easing late Tuesday 15 knots.Becoming northeast 25 knots Wednesday evening. Sea rough at times. Moderate southwest swell easing Wednesday.



Our base operators transmit the latest forecast daily at 8.30am and 7.30pm