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 an Stewart Island.


Situation Statement

Issued: 10:58am Thursday 25 May

A weak front remains slow-moving over the upper North Island. A ridge of high pressure over New Zealand recedes slowly to the east today, as a complex trough moves toward the west of the country.


Short Forecast

Issued: 2:05pm Thursday

Valid to: Midnight Friday

Nelson, Buller and Westland

Fine spells today. Cloud increasing tomorrow and rain spreading south from late afternoon, reaching Westland at night.

Marlborough, Canterbury and Otago

Mainly fine, but scattered rain about the Marlborough Sounds, Central Otago and Clutha late tomorrow.

Southland

Fine today. High cloud tomorrow, and scattered rain near the coast spreading elsewhere in the evening.

Fiordland

Patchy drizzle today. Rain tomorrow, possibly heavy later.


Extended Brief Forecast

Issued: 10:44am Thursday

Saturday

South Island, rain gradually clearing from the south, and becoming mostly fine.

Sunday

South Island, cloudy periods and isolated showers in the west, elsewhere mainly fine with patchy morning fog.

Monday

South Island, a few showers and increasing cloud in the west, fine elsewhere.


Brief Mountain Forecast

Issued at 12:22pm Thursday

Valid to Midnight Friday

South Island

Kaikoura ranges:

Mostly fine, but scattered rain late tomorrow.

Kahurangi and Nelson Lakes National Parks, also the Southern Alps:

Mainly fine today. Cloud increasing tomorrow, with rain developing north of Arthurs Pass from afternoon, possibly heavy later, and about the Southern Alps at night.

Fiordland:

Drizzle, turning to rain tomorrow with some heavy falls from evening. Snow lowering to 1600 metres at night.

WINDS: North or northwest winds developing, gale about Fiordland at times tomorrow.

Freezing Level: About 2500 metres, lowering to 1900 metres in fiordland tomorrow night.


Extended Mountain Forecast

Issued at: 1:33pm Thursday

South Island

Saturday:

Rain, with snow to 1600 metres, clearing south of Mt Cook, but easing to showers further north. Winds turning southeast before dying out, but becoming strong north of Arthurs Pass.

Freezing Level: Lowering to 1600 metres, but becoming 2400 metres in fiordland and kahurangi national park.

Sunday:

Remaining showers in the north clearing, otherwise mainly fine. Some late drizzle about coastal Fiordland. Northwesterlies developing, becoming strong in Fiordland.

Freezing Level: Rising to 2600 metres throughout.

Monday:

Rain developing south of Arthurs Pass, dry further north. Northwesterlies,strong or gale in Fiordland.

Freezing Level: Briefly lowering to 1600 metres in fiordland, otherwise about 2400 metres.


Nelson Lakes National Park

Tomorrow - Friday 26 May

Issued at: 11:54am Thursday

Fine with early frosts. Cloud developing in the afternoon, and rain in the evening. Northwesterlies rising to gale in exposed places in the evening, easing overnight.

Freezing level 2700m

Saturday

Periods of rain, with possible heavy falls, and snow lowering to 1800 metres, easing in the evening. Southeasterlies rising to gale in the afternoon.

Freezing level 2200m

Sunday

Remaining showers clearing early, then cloudy periods. Light winds.

Freezing level  Rising to 2200 metres.

Monday

Mainly fine. Westerlies developing.

Freezing level  Rising to 2600 metres


Canterbury High Country

Tomorrow

Issued at 10:27am Thursday

Fine with early frosts or fog. High cloud increasing, and rain developing from the west at night, with snow down to 2000 metres.

Wind at 1000 metres: Northwest rising to 55 km/h.

Wind at 2000 metres: Northwest rising to 55 km/h early and to gale 70 km/h at night.

Freezing level: 2400 metres

Sat May 27

Rain about the divide, with scattered falls further east, clearing and becoming fine everywhere in the afternoon or evening.

Wind at 1000 metres: Northwest 40 km/h turning southeast 30 km/h, dying out later.

Wind at 2000 metres: Gale northwest 65 km/h turning southeast 40 km/h, dying out later.

Freezing level: Lowering to 1400 metres.

Sun May 28

Fine apart from fog in some sheltered valleys. Northwesterlies developing, becoming strong at higher levels.

Mon May 29

A few showers developing about the divide, with cloud increasing further east. Northwesterlies, possibly strong in exposed places.


Westland Forecast

Issued at: 1:26pm 25 May

FRIDAY

Areas of cloud, and patchy rain south of Haast, becoming widespread rain in the evening. Northeasterlies, strong about the coast.

SATURDAY

Periods of rain, with possible heavy falls, clearing from the south to fine during the afternoon. Northeasterlies changing southeast in the afternoon.

SUNDAY

Partly cloudy. Light winds.

MONDAY

A few showers. Northeasterlies.

TUESDAY

A period of rain, then a few showers. Winds changing southwesterly.


Southern Lakes

Tomorrow

Issued at 10:27am Thursday

High cloud increasing. Patchy rain developing about the headwaters in the morning, turning to widespread rain at night. Snow lowering to 1800 metres.

Wind at 1000 metres: Northwesterly 45 km/h.

Wind at 2000 metres: Northwesterly 60 km/h, rising to gale 80 km/h for a time.

Freezing level: 2200 metres.

Sat May 27

Rain about the headwaters, with scattered falls further east, clearing and becoming mainly fine in the afternoon.

Wind at 1000 metres: Southerly 30 km/h dying out.

Wind at 2000 metres: Southwest 40 km/h dying out.

Freezing level: Lowering to 1600 metres.

Sun May 28

Fine apart from fog in some sheltered valleys. Northwesterlies developing, strengthening later.

Mon May 29

Rain about the headwaters, cloud increasing further east.Northwesterlies, strong in exposed places for a time.


Mt Aspiring National Park

Tomorrow - Friday 26 May

Issued at: 11:54am Thursday

Patchy drizzle, turning to rain in the evening, with possible heavy falls, and snow to 1900 metres. Gale northerlies, easing in the evening.

Freezing level

Saturday 27 May

Rain, with snow lowering to 1700 metres, clearing by afternoon to fine.

Freezing level 2100m

Sunday 28 May

Cloudy periods. Northwesterlies developing.

Freezing level  About 2400 metres.

Monday 29 May

A few showers turning to rain later, falling as snow above 1900 metres. Northwesterlies becoming strong.

Freezing level  Lowering to 2000 metres.


Fiordland National Park

Tomorrow - Friday 26 May

Issued at: 11:54am Thursday

Periods of rain, mainly about the coast, with possible heavy falls in the evening. Snow to 1900 metres, lowering to 1400 metres in the evening. Gale northerlies, easing evening.

Freezing level 2400m

Saturday 27 May

Rain, with snow to 1100 metres, clearing to fine in the morning, but some cloud lingering in the south.

Freezing level 1400m

Sunday 28 May

Mainly fine, but cloud increasing about the fiords and a few showers developing there. Northwesterlies becoming strong.

Freezing level  Briefly lowering to 1400 metres.

Monday 29 May

Showers, turning to rain later, with snow to 1900 metres. Gale northerlies.

Freezing level  Rising to 2200 metres.


Southland Forecast

Issued at: 1:26pm 25 May

FRIDAY

Scattered rain about the south coast and Stewart Island, becoming widespread in the evening. Northerlies, strong about Stewart Island,changing westerly at night.

SATURDAY

Rain, clearing in the morning to a mostly sunny day. Southwesterlies, dying out in the evening.

SUNDAY

Fine with light winds.

MONDAY

Cloud increasing throughout the day. Northerlies developing.

TUESDAY

Scattered rain for a time. Winds changing westerly.


Foveaux

Valid to Midnight Friday

Issued at 12:53pm Thursday

Forecast:

Northerly 15 knots. Sea slight. Southwest swell 2 metres, easing. Northeast swell 1 metre developing offshore. Poor visibility in rain developing Friday afternoon.

Three Day Outlook:

Changing early Saturday southwest 20 knots, easing late Saturday variable 10 knots. Developing Sunday northerly 20 knots. Southwest swell becoming moderate Saturday.


Puysegur

Valid to Midnight Friday

Issued at 12:53pm Thursday

Forecast:

Northerly 20 knots but 35 knots west of West Cape, rising to 45 knots in the west this evening. Becoming southwest 20 knots everywhere Friday evening. Sea becoming high in the west for a time. Northerly swell in the west rising to 3 metres for a time. Southwest swell 1 metre, easing. Poor visibility in drizzle, mainly in the west,turning to rain early Friday morning.

Three Day Outlook:

Southwest 20 knots, easing overnight Saturday variable 10 knots. Developing Sunday morning northerly 20 knots, rising in the west late Sunday 30 knots, then Monday 40 knots in the west with rough sea. Moderate northerly swell easing Saturday, but returning Monday. Southwest swell becoming moderate Saturday.

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