Heavy rain and severe northwest gales for parts of the South Island

A front moves northeast across the South Island today, preceded by strong to gale northwest winds, and heavy rain for western regions. The heaviest rain is forecast for the ranges of the Westland District, while severe northwest gales are possible in exposed areas from Otago to the Canterbury High Country.

Note, a period of snow is expected to around 500 to 600 metres over Fiordland and Westland overnight Thursday and Friday morning. This is not expected to approach warning amounts, but may impact motorists and trampers in these regions.

Watches and Warnings for heavy rain and strong winds are in force.

People are advised to stay up to date with the latest forecasts.

Impact: Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous.

Area: The ranges of the Westland District

Period: 5hrs from 9am - 2pm Thu, 25 Apr

Forecast: Expect a further 40 to 60 mm of rain on top of what has already fallen. Peak intensities of 15 to 25 mm/h. Note, further rain expected tonight and Friday morning with snow to around 600 metres.

Impact: Strong wind gusts could damage trees, powerlines and unsecured structures. Driving may be hazardous, especially for high-sided vehicles and motorcycles.

Area: Canterbury High Country

Period: 8hrs from 9am - 5pm Thu, 25 Apr

Forecast: Severe gale northwesterlies, with damaging gusts of 130 km/h in exposed places.

Issued: 9:07am Thu, 25 Apr
Next update: 9pm Thu, 25 Apr