Mountain Radio

Latest South Island Weather Forecast

This forecast was transmitted by ZKIB BASE this morning on our 8.30am voice call  to all of our field sets located in the South Island and Stewart Island.


Situation Statement

Issued: 12:19am Thursday 20 Sep

A low centred to the north of the North Island directs a moist easterly flow over northern Aotearoa. A narrow ridge over the South Island and the south of the North Island is retreating eastward, which allows a front to move onto the southwest of the South Island this evening.


Short Forecast

Issued: 4:18am Thursday 20 Sep

Valid to: Midnight Thursday 20 Sep

Nelson and Marlborough to Southland

Mainly fine, but a few spots of rain in Southland and Otago from afternoon.

Buller, and Westland north of the Glaciers

Cloud increasing, isolated showers from evening.

The remainder of Westland, and Fiordland

Showers turning to rain this morning.


Extended Brief Forecast

Issued: 11:23pm Wednesday 19 Sep

Friday

South Island, Rain in the west and south easing to showers. Partly cloudy with patchy rain elsewhere.

Saturday

South Island, Becoming mainly fine, but showers returning to Fiordland and coastal Southland.

Sunday

South Island, Rain developing, with snow lowering to 500 metres at night in the south. Remaining dry in Nelson and Marlborough.


Brief  Mountain Forecast

Issued at 3:32am Thursday 20 Sep  

Valid to Midnight Thursday 20 Sep

South Island

Kaikoura ranges:

Fine, high cloud at times.

Kahurangi and Nelson Lakes National Parks, and the Southern Alps north of Mount Cook:

Cloud increasing, Isolated showers in the west from evening.

The Southern Alps south of Mount Cook, and Fiordland:

Showers turning to rain in Fiordland this morning and elsewhere from afternoon. Snow lowering to 1400 metres at times. WINDS: Northerlies, gale in Fiordland, easing this morning.

Freezing Level: 3000 metres in the north, sloping to 1600 metres in the south. lowering to 2400 metres in the north and 1600 metres in the west.


Extended Mountain Forecast

Issued at: 3:33am Thursday 20 Sep

South Island

Friday:

Rain west of the main divide, easing to showers then clearing south of Arthurs Pass later. Patchy rain elsewhere, but dry at first about the Kaikoura ranges. Snow lowering to 1100 metres in Fiordland for a time. Southerlies developing, then dying out. Late westerlies in the south.

Freezing Level: Lowering to 2200 metres in the north but 1400 metres in the far south of a time.

Saturday:

Cloudy periods west of the main divide, with showers developing in Fiordland and further north later. Fine or becoming fine elsewhere. Northwesterlies developing everywhere, rising to gale in the south.

Freezing Level: Rising to 3000 metres in the north. about 2000 metres in the far south.

Sunday:

Rain spreading north, but remaining dry about the Kaikoura ranges. Rain turning to snow south of Mt Cook and above 1000 metres between Arthurs Pass and Mt Cook. A change to southwesterlies, gale in exposed places.

Freezing Level: Lowering to 2200 metres in the north and to 1000 metres in the south.


Nelson Lakes National Park

Today - Thursday 20 September

Issued at: 8:28pm Wednesday 19 Sep

Few showers

Partly cloudy, with isolated showers from evening.

Freezing level 2700m

Tomorrow - Friday 21 September

Rain

Showers turning to rain in the afternoon, easing in the evening. Snow to 1600 metres in the south.

Freezing level 2200m

Saturday 22 September

Fine

Fine spells. Light winds

Sunday 23 September

Windy

Showers developing. Snow lowering to 1700 metres. Westerlies rising to gale in exposed places.

Freezing level  Lowering to 2000 metres.

Monday 24 September

Snow

Showers clearing later. Snow lowering to 800 metres. Strong southwesterlies.

Freezing level  Lowering to 1000 metres.


Canterbury High Country

Today

Issued at 10:43pm Wednesday 19 Sep

Cloud gradually increasing from the south. Scattered rain developing south of Mt. Cook in the afternoon, mainly about the Divide where snow lowers to 1200 metres.

Wind at 1000 metres: Northwest 30 km/h, rising to northwest 40 km/h in the morning for a time late morning and afternoon.

Wind at 2000 metres: Northwest 50 km/h.

Freezing level: Gradually lowering to 1800 metres about the Divide, and about 2400 metres further east.

Tomorrow

About the Divide, rain setting in from afternoon. Elsewhere, rain spreading north from late morning. Snow lowering to 1200 metres about the Divide.

Wind at 1000 metres: Changing southerly 30 km/h in the morning then dying out in the evening.

Wind at 2000 metres: Changing southwest 30 km/h in the morning then southeast 30 km/h in the afternoon.

Freezing level: Gradually rising to to 2000 metres.

Sat Sep 22

Mainly fine, with cloudy periods increasing west of the Divide. Westerlies.

Sun Sep 23

Showers west of the Divide, turning to rain with possible heavy falls. Mostly fine in the east, but rain at night. Snow lowering to 1000 metres. Gale westerlies changing southerly at night.

Mon Sep 24

Showers clearing. Snow to 700 metres at first. Winds turning westerly.


Westland Forecast

Issued at: 2:41am 20 Sep

THURSDAY

20 SEP

Morning cloudy periods, and isolated showers south of the Glaciers. Showers developing elsewhere in the afternoon, but turning to rain in the south. Northerlies developing in the afternoon.

FRIDAY

21 SEP

Rain easing to isolated showers in the morning with a southwest change. Becoming fine in the south during the afternoon.

SATURDAY

22 SEP

Cloudy periods increasing. Few evening showers. Southwesterlies.

SUNDAY

23 SEP

Showers turning to rain, with heavy falls possible, easing late. Winds turning northwest, then late southwest change.

MONDAY

24 SEP

A few showers clearing. Southwesterlies.

TUESDAY

25 SEP

Showers with westerlies.


Southern Lakes

Today

Issued at 10:43pm Wednesday 19 Sep

High cloud increasing. Rain developing about the headwaters afternoon with snow lowering to about 1100 metres, and a few spots spreading further east. Snow lowering to about 1100 metres about the headwaters.

Wind at 1000 metres: Northwest 45 km/h, turning northeast 40 km/h in the afternoon.

Wind at 2000 metres: Northwest gale 70 km/h, gradually easing to 40 km/h during the afternoon and evening.

Freezing level: Lowering to 1100 metres in the morning, then gradually lifting to 1500 metres.

Tomorrow

Cloudy with showers spreading north in the morning, falling as snow to about 1200 metres at first. Showers becoming isolated in the evening.

Wind at 1000 metres: Changing southerly 30 km/h in the morning then gradually dying out.

Wind at 2000 metres: Changing southwest 30 km/h in the morning.

Freezing level: Gradually rising to 2200 metres.

Sat Sep 22

Cloudy periods. Northwesterlies strengthening.

Sun Sep 23

A period of rain then showers. Snow lowering to 700 metres. Gale northwesterlies changing southerly.

Mon Sep 24

Showers clearing early, with snow to 500 metres, then fine. Winds turning westerly.


Mt Aspiring National Park

Today - Thursday 20 September

Issued at: 8:28pm Wednesday 19 Sep

Windy

Showers turning to rain afternoon, with snow to 1100 metres at first, but slowly lifting to 1300 metres. Gale northwesterlies, easing late evening.

Freezing level 1400m

Tomorrow - Friday 21 September

Few showers

Rain, falling as snow to about 1400 metres, easing to a few showers in the morning with sunny spells developing in the west.

Freezing level 2000m

Saturday 22 September

Cloudy

Cloud increasing. Showers developing from evening. Snow to 2300 metres. Winds tending northwest.

Sunday 23 September

Windy

Showers turning to rain for a time, brief heavy falls. Snow lowering to 700 metres. Change to gale southwesterlies.

Freezing level  Lowering to 1000 metres.

Monday 24 September

Snow

Showers clearing for a time. Snow lowering to 500 metres. Gale southwesterlies easing.

Freezing level  Lowering to 800 metres.


Fiordland National Park

Today - Thursday 20 September

Issued at: 8:28pm Wednesday 19 Sep

Windy

Showers turning to rain early, and snow to 1100 metres at times. Gale northwesterlies, possibly severe gale in exposed places, easing evening.

Freezing level 1400m

Tomorrow - Friday 21 September

Showers

Rain clearing to fine from the south late morning, but a few cloudy periods remaining about the southern fiords. Snow to 800 metres at first.

Freezing level 1700m

Saturday 22 September

Windy

Showers developing early. Snow to 1500 metres. Northwesterlies rising to gale later.

Sunday 23 September

Windy

Rain turning to showers. Snow lowering to 600 metres. Change to gale southwesterlies.

Freezing level  Lowering to 900 metres.

Monday 24 September

Windy

Showers clearing for a time. Snow to 500 metres at first. Gale westerlies.

Freezing level  Lowering to 800 metres.


Southland Forecast

Issued at: 6:28am 20 Sep

THURSDAY

20 SEP

High cloud for the mainland, and a few spots of rain from afternoon. About Stewart Island, occasional rain. Northwesterlies easing.

FRIDAY

21 SEP

Rain easing to a few showers early, then clearing in the afternoon and fine spells developing. An early southwesterly change.

SATURDAY

22 SEP

Mainly fine, with showers about the south coast gradually clearing. Winds turning northwest.

SUNDAY

23 SEP

Thickening high cloud. Rain developing, easing to showers later.Snow lowering to 500 metres. A cold southerly change.

MONDAY

24 SEP

Showers retreating to the south coast, fine breaks increasing elsewhere. Snow to 500 metres at first. Winds turning westerly.

TUESDAY

25 SEP

Showers with westerlies.


Foveaux

Valid to Midnight Thursday 20 Sep

Issued at 4:42am Thursday 20 Sep

Forecast:

Northwest 25 knots, becoming northeast 15 knots late this morning, then turning northwest 15 knots this evening. Moderate sea, easing. Southwest swell rising to 3 metres offshore. Fair visibility in scattered rain this evening.

Three Day Outlook:

Becoming Friday morning southwest 25 knots and Friday evening northwest 25 knots. Rising early Saturday westerly 35 knots then easing late Saturday northwest 25 knots. Rising early Sunday northwest 35 knots,changing late Sunday southwest 25 knots.Sea very rough at times. Moderate southwest swell.

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