A trough moving over the lower North Island and upper South Island is expected to bring further heavy rain and isolated thunderstorms to parts of the country.
MetService issued a severe weather watch this morning for Nelson, Marlborough and Taranaki.
It warned that accumulations could approach warning amounts about Mt Taranaki, Richmond Ranges and the northwest Nelson Ranges.
The rain is expected to ease from northern parts of the South Island this evening and Taranaki tonight.
MetService urged people in affected areas to stay up to date with forecasts in the event that a full warning is required.
Nelson residents were warned off the roads last night as a torrential downpour caused flooding on several roads in the city.
Rain is expected to ease in the area by this evening with early showers forecasted for tomorrow.
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