Photo: 123RF The MetService is forecasting up to 150mm of rain about the ranges in Westland south of Otira, while up to 100mm is expected nearer the coast overnight through until midday tomorrow. There is also a heavy rain warning out for Nelson northwest of Motueka with up to 140mm expected about the ranges and up to 80mm elsewhere. The MetService is warning that the rain may cause streams and rivers to rise rapidly and surface flooding and slips are also possible. Severe Weather Update Heavy rain and strong northeasterly winds for many NZ regions today and/or tomorrow as an active front crosses the country.