Incoming torrential rain and thunderstorms. Motorists prepare for possible surface flooding and near zero visibility at times.
The lightning tracker at WeatherWatch.co.nz is detecting dozens of thunderstorms around western Waikato and west of the Waitakere Ranges.
It's possible there may be isolated wind damage as a result of squalls. We also have low to moderate confidence of a possible isolated tornado in these two regions.
This is the leading front - behind it will be a mixture of sunny spells and squalls (the squally may not arrive to Auckland and Waikato until later in the day).