Heavy rain on way
A complex front is expected to move over the South Island from the Tasman Sea today, then become slow-moving about Buller and weakening on Tuesday.
This system is expected to bring a period of heavy rain to the west and northern parts of the South Island during today and Tuesday.
The Heavy Rain Watch for the ranges of Westland, Buller and northwest Nelson has been upgraded to a Warning.
The Richmond Range has now been added to Heavy Rain Watch.
In addition, northerly gales affecting Fiordland ahead of the front should continue this morning, and a Watch is still in force.
People are advised to stay up to date with the latest forecasts in case any changes are made.
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 Buller and Westland about and north of Otira, Nelson west of Takaka. Valid: 16 hours from 8:00pm Monday to 12:00pm Tuesday Forecast: Expect 80 to 100 mm of rain to accumulate. Peak rates of 10 to 15 mm/h. Changes: Upgraded to a full warning.
Area: The ranges of Westland south of Otira Valid: 13 hours from 2:00pm Monday to 3:00am Tuesday Forecast: A period of rain. Expect 80 to 120 mm of rain to accumulate. Peak rates of 15 to 25 mm/h. Changes: Upgraded to a full warning.