North Island

Forecast DateFar North
NAL
AK
NIMT, ECMT, Auckland
BOP
ECMT
West NI
NIMT, MNPL
East NI
PNGL, WRAPA
WN
NIMT, WRAPA, Wellington
See forecast details below
Fri 27 Dec
Conference Call
1. More rain for East NI with [another 25+ mm in the Wairoa region, but eases by late. 24-hour totals (Thurs/Fri) exceed amber risk level thresholds for this area.] 2. Southwest wind gusts 80+ km/h for exposed parts of Far North about and south of Helensville, and for AK. Winds ease late. 3. Southerly wind gusts 80+ km/h for WN, Taranaki, and East NI south of Masterton and north of about Waipukurau. Winds ease most places late in the day.
Sat 28 Dec
Southerly wind gusts 80+ km/h before about 7 am for East NI in the Napier and Wairoa areas.
Sun 29 Dec
No significant weather.
Mon 30 Dec
Rain with some thunderstorms and downpours spread over the North Island. Risk of 25+ mm in many places south of Hamilton, including BOP.
Tue 31 Dec
1. Rain for many areas with 25+ mm about and south of a line Taranaki to Central Plateau to Wairoa. [Risk of 50+ mm for East NI.] 2. Southerly wind gusts 80+ km/h for WN and area from about Whanganui to Stratford. 3. Risk of southwest wind gusts 80+ km/h developing for exposed parts of AK and Far North south of about Helensville.

South Island

Forecast DateWest Coast
MIDLND, SNL, HKTKA
Upper SI
MNL, MIDLND, Christchurch
Lower SI
MSL
See forecast details below
Fri 27 Dec
1. Southwest wind gusts 80+ km/h for the Kaikoura Coast, eases evening. 2. Southeast waves/swell reach around 3 m for the Kaikoura north coast area. High tide is around 3 pm. No impacts to network expected.
Sat 28 Dec
No significant weather.
Sun 29 Dec
Rain for Southland with totals reaching 25 mm in some places by late.
Mon 30 Dec
1. Rain spreads across the South Island with totals 25+ mm in many places on MNL/MSL north of about Balclutha, and for Midland line. Rain eases south of Timaru later. 2. Scattered heavy pm/evening showers with thunderstorms/downpours for West Coast. Some places get 25+ mm in a short period. 3. Southwest wind gusts 80+ km/h develop for exposed places on MNL, esp. Lyttleton and Kaikoura Coast.
Tue 31 Dec
1. Rain eases from south on MNL during day. Some places get another 25 mm, including for Midland line east of Avoca. 2. Southwest wind gusts 80+ km/h for exposed parts of MNL ease during the day. 3. Southeast wind gusts 80+ km/h for a time for inland Midland line west of Arthurs Pass.

Colour Key

Non-impacting weather expected
Active weather - but with minimal impact expected (see comments). Note that -active weather- is based on 24-hour rainfall totals >25 mm, wind gusts >80 km/h, and snow accumulation >5 cm etc.
Significant weather expected - potential for impacts on network at some locations (see underlined comments). Additional email updates to be issued with focus on high risk areas.
Significant weather expected - potential for widespread impacts on network (see underlined bold comments). Additional email updates to be issued with focus on high risk areas.