The unstable air mass over the North Island produced some rain, hail and strikes of lightening in Hawke's Bay yesterday.
MetService meteorologist Tom Bell said there was a low to the east which was driving a strong southerly flow over the region bringing these convective showers.
Strong convection causes rain to become more localised, which means some areas are hit harder and faster.
Luckily the weather is set to improve today with a ridge moving onto the country, easing any remaining showers.
"The southerlies should die out and it is looking like a reasonably good day."