KEY POINTS:
Southland and Otago are expected to bear the brunt of the next stormy weather system to hit New Zealand.
MetService forecasters are warning an active front will move over the South Island tomorrow and become slow moving over Westland on Tuesday.
It is expected to bring heavy rain to the Southern Alps and Westland.
In Fiordland, up to 120mm of rain is expected to fall in the 15 hours from midday Monday.
However, over Westland the rain may continue until Wednesday, with more than 400mm forecast to fall in the hills in the 48 hours from Monday afternoon.
The "spillover" effect of the rain is likely to reach the headwaters of Canterbury and Otago rivers and lakes on Tuesday and Wednesday.
Winds are also expected to reach gale or severe gale over parts of Southland and Otago on Monday.
Forecasters are warning trampers and those on the roads to keep up to date with the conditions, and watch for rapidly rising streams and rivers.
- NZPA
