Heavy Rain Warning 13 December 2014 There is a heavy rain warning for the Coromandel 14 December 2014. Rain is expected to become heavy during Sunday morning and should ease Sunday evening. Between 7am and 7pm Sunday expect 80-100mm to accumulate. Peak intensities of around 15mm per hour around the middle of the day. Coastal forecast Colville variable 10 knots easterly 20 knots developing this evening.Sea becoming moderate, poor visibility during rain developing this afternoon.