Nelson residents are being warned to stay off the roads tonight as a torrential downpour closes several roads in the city.
Nelson Bays police said tonight many roads were drenched by surface flooding and contractors were out erecting warning signs.
Flooding is affecting roads in Wakefield, Kohatu, Motueka, Brightwater, Appleby and Richmond.
A slow-moving low over the city is expected to move east over the North Island and upper South Island tonight and tomorrow.
Heavy rain is expected to ease in Nelson, with the worst of the weather expected to move to the Bay of Plenty.
A severe weather warning is in force for the ranges of eastern Bay of Plenty.