EX-TC â€œUesiâ€ is approaching southwestern NZ from the northwest on Sunday while strengthening temporarily – it is expected to cross over Fiordland, Westland, Otago and Southland from late Sunday to early Monday while slowly weakening. Despite the centre of the low crossing these areas most of the ‘weather’ is on the West Coast.
- Rain is the main issue with Uesi, more so than wind.
- Rainfall totals of 100-150mm or more in central-west districts of the South Island by Monday morning. Some flooding and slips are possible on the West Coast.
- Severe gale force winds exceeding 90km/h could be brought to the exposed western coastal districts while the exposed highland districts of the South Island may have gusts in the mountains over 110km/h. Main winds are from Sunday to early Monday.
- High waves exceeding 8 metres are expected on the West Coast on Sunday.
- In addition, the weak front and the moist onshore winds are expected to bring intermittent showers or prolonged rain to the West Coast until at least Wednesday morning.
- In Christchurch, the max temperature is expected to be around 27C on Sunday and the low 30s on Monday due to the combination of warmer northerly winds brought by EX-TC Uesi along with Foehn winds which will intensify those (Foehn winds are winds that heat up when flowing over mountains – eg, the Canterbury nor’wester)