Serious amount of rain in store for north-west South Is

The upper South Island is on high alert this morning with some areas forecast to receive more than 500mm of rain over the next couple of days. There's an orange rain warning in force for Buller, Westland and the Tasman district west of Motueka from early tomorrow morning this morning. There's also a heavy rain watch for the rest of the Tasman district, including Nelson, the Marlborough Sounds, and the Bryant and Richmond ranges. Nick Truebridge spoke with Philip Duncan from WeatherWatch.