"We're really happy to report that there was only minimal damage and no injuries. The thunderstorm watch is in place until 4pm so please take caution," A Taranaki Civil Defence and Emergency Management (TCDEM) spokeswoman said.
TCDEM group controller Craig Campbell-Smart said minor damage had been reported at a commercial property due to the tornado.
A set of industrial doors was blown open and the roof of a chicken cage has been ripped open as well, he said.
Fire and Emergency New Zealand (FENZ) had responded to the incident, he said.
The tornado had passed through a chicken farm near Waitara and had caused minor damage, a spokesman said.
FENZ has responded to 12 callouts of minor flooding in the area.
MetService said a slow-moving front was bringing bursts of heavy rain to the far south of the North Island and the far north of the South Island.
"The heaviest falls are expected about northern Taranaki including the mountain, where a heavy rain warning is now in force."
A heavy rain warning was in place for North Taranaki until 11pm on Monday.
