A cold blast from the Southern Ocean is moving across New Zealand On Wednesday and Thursday, delivering dangerous waves, cold temperatures, thunderstorms, and low-level snow and gale-force winds.
According to New Zealand Met Services, an unstable cold southwest flow sweeps up New Zealand today and into Thursday, and has resulted in many severe weather watches being issued this morning.
The cold air mass is especially unstable and this thunderstorm outlook chart has reflected on these cold blasts. The severe thunderstorms could lower snow to sea level and bring localized heavy rain. A severe thunderstorm watch has been issued for Christchurch and the Canterbury Plains between 3 pm-11 pm today.
Strong cold southwesterly winds will surge up New Zealand on Wednesday and will peak later in the day. Within 24 hours from noon on Wednesday to noon, on Thursday nationwide may be the gustiest with showers.
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