MetService says cooler temperatures forecast for the next few days should begin to lift by the end of the week.
Bands of rain will move northwards from the bottom of the South Island through the first part of the week, preceded by strong northwesterlies and followed by a strong, cold and wet southerly.
Heavy rain and strong wind watches are in place for various parts of the South Island, some starting tonight and extending through to Tuesday.
Heavy rain and severe gales possible for parts of the South Island late today through to Wednesday
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— MetService (@MetService) March 18, 2023
One heavy rain warning was in place for Fiordland and four heavy rain watches for Southland, Otago and Clutha, and Westland south of Ōtira
There is also a heavy orange rain warning for Fiordland, and strong wind watches are in place for Southland tonight and North Otago and Canterbury for Monday.
MetService said 210 to 260 millimetres were likely to accumulate about the ranges, and 70 to 120 millimetres near the coast. It said peak rain rates could be up to 35 millimetres an hour in the ranges, and thunderstorms were possible.
MetService forecaster Aidan Pyselman said a front was set to move over the lower South Island in the early hours of Monday.
“It’s preceded by strong north westerlies, and then it’s going to bring some heavy rain as it moves up the South Island.
“Then slightly further afield we’re also going to see some really strong southerlies in behind it as we move through the week, and also some much cooler temperatures as well. It comes up onto the North Island during Wednesday, Thursday.
“By about Friday we should see temperatures slightly rebounding and warming up again.”
Story Credit: rnz.co.nz