Mr Duncan said the trough was likely to bring heavy rain to the west and high winds to the east.
Unlike in the south, there were no wind-related incidents reported to the Fire Service in Napier and Hastings, although there was work for clean-up crews after several large palm fronds came down along Kennedy Rd.
There will, however, be at least one more mild taste of the Indian summer tomorrow.
Mr Duncan said things would "calm down" for the day and Napier and Hastings could enjoy sunshine and 22C, although some strong wind gusts would linger.
"But things ramp up again on Friday," he said, and that meant more consistent rain than the 1.5mm that fell over Napier on Monday night and the 0.8mm over Hastings.
While Friday was stacking up to be 23C there were showers and strong winds in the mix while the weekend in the Bay has "typical autumn" stamped all over it. Showers are forecast for Saturday as strong westerly winds, turning to south-westerly, arrive and Sunday is set for rain and just 16C - with the start of next week also likely to be wet according to long-range forecasts.
"It is quite a big change from the warm subtropical lazy summer weather we have been seeing lately - this is kind of the stormier side to autumn."
At the end of May last year a large low pressure system coupled with strong southerlies brought a storm to the eastern coastline which saw temperatures drop and waves up to 6m rolling in between East Cape and North Canterbury.
Napier's Marine Parade beachfront walk and cycleway was left covered in washed-up debris.