It must be spring.
Lightning without the thunder flashed through the sky over the region on Friday night as clear skies treated the region to a view of a thunderstorm raging to the west of the North Island.
The eerie sight is set to be followed by yet more unstable weather that includes potentially gale-force winds, a chill-inducing southerly change, and then a chance of sustained and heavy rain later in the week.
MetService meteorologist Mmathapelo Makgabutlane said strong northwesterly winds could reach gale force in exposed parts of Hawke's Bay on Monday.
A strong wind warning was on Sunday issued for the Tararua district from 3am on Monday to 6pm.