A high temperature of 22C is forecast for both days followed by overnight lows of 15C on Monday and 16C on Tuesday.
“The daytime temperatures will be cooler than usual for February but the low cloud cover means the overnight temperatures remain warm.”
Makgabutlane said strong wind gusts could damage trees, powerlines, and unsecured structures.
Driving may be hazardous, especially for high-sided vehicles and motorcycles.
A Horizons Regional Council spokesperson said Civil Defence personnel were ready to respond if an emergency situation should arise and would meet early on Monday for an update.
“We are monitoring the situation with MetService and will be updating everyone as we know more about how Cyclone Gabrielle is tracking.
“In the meantime, we ask that everyone follows the advice issued on Friday to secure outdoor items and have a plan for their household.”
Air Chathams chief operating officer Duane Emeny said scheduled flights between Whanganui and Auckland had not been cancelled.
“The flights for Monday and Tuesday are still scheduled and we will let passengers who are booked on those flights know if we need to cancel,” he said.
“I would suggest that passengers who haven’t booked and want certainty should book for later in the week.”
Makgabutlane said any effects of the cyclone were expected to ease off by Wednesday.
“The forecast for Wednesday shows the south easterlies easing and a partly cloudy day with a high of 22C,” she said.
“The easterly winds will ease off by Thursday when it will be showery with light southerlies.”
Overnight lows will remain in the mid-teens and daytime temperatures are expected to increase with daytime highs of 23C forecast for Thursday and Friday followed by overnight lows of 14C.
Showers will linger into Saturday when a high of 24C is expected followed by an overnight low of 13C.
