A low pressure system west of the North Island draws in an easterly airflow bringing some wet weather although the southwestern corner of the North Island is dry at times. Meanwhile the South Island under a ridge is mainly dry, perhaps a light shower or two for Marlborough.

Wet for most of the North Island today, there may be a period of dry for a time this morning for Auckland however rain about Northland with heavy falls spreads southwards over the upper North Island during the day reaching the Waikato and Bay Of Plenty this evening. Rain may be very heavy in some spots bringing a chance of flooding. Conditions will ease overnight.

Rain for Hawkes Bay and Gisborne easing to showers this afternoon then picking up again overnight turning back to rain, patchy showers about Wairarapa for most of today then rain moves in overnight. Morning showers clear from Taranaki through to Kapiti then overnight rain moves in.

A light shower or two possible for Marlborough and the northwest Nelson area at times today, and then also Nelson later this evening. Showers then some rain more likely about the Nelson / Marlborough regions by dawn on Tuesday.

Image: Monday 24th December 2018 1:00pm MSLP / Rain map – weathermap.co.nz

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz