Torrential rain is expected to douse the top half of the
country tonight and tomorrow as a spring front moves through.
Most exposed to this torrential rain will be Northland,
Auckland, Waikato, Coromandel Peninsula, Bay of Plenty,
Taranaki and Kapiti, WeatherWatch.co.nz said.
Rainfall rates may be extremely high for a time in localised
thundery downpours, the website said.
"This could lead to flash flooding and surface flooding,
similar to what we saw in Wellington and the lower North
Island last night."
The most extreme weather would be localised areas and the
risk zone was from the upper South Island to the top of the
North Island, mainly north western facing areas.
Thunderstorms may produce cloud to ground strikes, as we saw
in Wellington last night.
WeatherWatch.co.nz advised people to remain indoors during
"Globally lightning kills more people than any other severe
weather, and while the numbers of lightning strikes on humans
in New Zealand is very low this could be partially attributed
to messages...making it to the public beforehand."