The Antarctic southerly is going to deliver a list of weather extremes across New Zealand for Wednesday and Thursday.
Here are some of the interesting talking points:
Lower South Island: Windchill below freezing for 36 hours in parts of Southland – from midnight last night to noon Thursday. It will feel like -1 to -5 for this entire period.
Lower North Island: Windchill around freezing, or below it, for 36 hours in Wairarapa – from midnight last night to noon Thursday.
Dunedin has a Daytime Max Temperature of just +5C today.
Dunedin will have a Feels Like/Windchill of -6 overnight tonight/Thursday morning
Gore has a Daytime Max Temperature of just +3C today!
Queenstown’s Daytime Max Temperature is +4C today and the overnight low overnight tonight is -3C
Arthur’sPass is forecast to drop to a bitterly cold -9C on Wednesday night/Thursday morning
Tekapo has a high of only +2C on Wednesday and drops to -7C tomorrow night, record-challenging cold.
Christchurch has some chance of snow – but totals vary from just a trace or rain/snow mix, to up to 5cm, main risk Wednesday night and Thursday AM.
Wellington has a high of +7C on Thursday but a feels like/windchill temperature of +2C at lunchtime with a southerly gusting to gale force. Dust the winter scarf off.
Wellington’s hill top suburbs have a chance of snow overnight Wednesday/Thursday morning
WeatherWatch.co.nz can’t rule out the chance of some sea level snow flakes in the lower North Island in the early hours of Thursday morning – but won’t be much, if at all.
The northern most main centres with snow potential (or a rain snow mix) are: Stratford, Dannevirke, Waiouru and Ohakune. Please note: this doesn’t mean heavy snow for all these main centres, but the chance of snow flakes in the main centre (or at least very nearby).
The northern most areas likely to receive snow are: TheKaimai and CoromandelRanges – only a small amount (1 to 3cm maybe on the peaks)
Most likely candidates for sea level snow: Southland, Otago, Canterbury.
Sleet may fall in Wellington, Napier and Hastings, possibly PalmerstonNorth.
A huge high pressure system (mostly responsible for this cold blast) will cross NZ over Fri-Sat-Sun bringing settled weather, light winds, cold nights but milder days. Dunedin’s high on Sunday is back into the mid-teens.
The 7 day “Departure from Normal” rainfall forecast shows a big portion of NZ leans drier than average in almost every region (other than the West Coast, Southland, Wellington and Wairarapa – all of which have normal rainfall for this time of year over the next several days).