Heavy Rain Warning – Orange Period: 7hrs from 9am – 4pm Thu, 9 Jun
Area: Buller and Westland north of Okarito
Forecast: Expect a further 30 to 50mm of rain on top of what has already fallen. Peak rates of 10 to 20mm/h and thunderstorms likely. Another period of heavy rain is possible on Friday, and a Watch is now in force covering this possibility.
Impact: Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous.
Road Snowfall Warning Period: 12hrs from 3am – 3pm Fri, 10 Jun
Area: Arthur’s Pass (SH73)
Forecast: Snow may affect higher parts of the road, and 1 or 2 cm may settle on the road near the summit at times, with lesser amounts down to 800 metres. Another period of snow is possible from Friday night and into Saturday.
Road Snowfall Warning Period: 12hrs from 3am – 3pm Fri, 10 Jun
Area: Porters Pass (SH73)
Forecast: Snow showers may affect higher parts of the road, and 1 or 2 cm may settle on the road near the summit at times, with lesser amounts down to 800 metres. Another period of snow is possible from Friday night into Saturday.
Road Snowfall Warning Period: 13hrs from 11pm Thu, 9 Jun – noon Fri, 10 Jun
Area: Haast Pass (SH6)
Forecast: Snow may affect the road from tonight through to around midday Friday, and 1 to 3 cm of snow may settle on the road near the summit. Another period of snow is possible from Friday evening into Saturday.
Road Snowfall Warning Period: 3hrs from midnight Thu, 9 Jun – 3am Fri, 10 Jun
Area: Lindis Pass (SH8)
Forecast: Snow flurries may affect the summit of the road this (Thursday) morning, but little if any snow should settle on the road. A brief period of snow may affect the road overnight tonight, and 3 to 5 cm of snow may settle on the road above 800 metres, with lesser amounts down to 600 metres. Please note, another period of snow may affect the road from late Friday into early Saturday morning.
Heavy Rain Watch Period: 24hrs from midnight Thu, 9 Jun – midnight Fri, 10 Jun
Area: Westland and Buller
Forecast: A brief burst of heavy rain is expected overnight tonight (Thursday), then rain should pick up again from late Friday morning. Thunderstorms are also possible. Rainfall amounts may approach warning criteria, mainly about the ranges. The freezing level is forecast to lower to around 1200 metres in Westland on Friday, with heavy snow likely above about 900 metres, though snow may fall as low as 600 metres at times or possibly lower, especially south of the Glaciers. Note, furthers showers, some possibly heavy, are expected into Saturday.
Heavy Snow Watch Period: 6hrs from midnight Thu, 9 Jun – 6am Fri, 10 Jun
Area: Central Otago, the Queenstown Lakes District and the Canterbury High Country west of Otematata and about and south of Mount Cook village
Forecast: A brief period of heavy snow is possible above 700 metres during this time, and snow amounts may approach warning criteria above 700 metres. Please note, another period of heavy snow is possible late Friday and Saturday.
Strong Wind Watch Period: 7hrs from 11pm Thu, 9 Jun – 6am Fri, 10 Jun
Area: Nelson, Buller, Westland, Marlborough excluding the Sounds, the Canterbury High Country, Central Otago and the Queenstown Lakes District
Forecast: Northerly winds may approach severe gale in exposed places. Please note, another period of severe gale north to northwesterlies is possible late Friday.