Friday: South to southwesterly 10/15 knots increasing to 15/20 knots in the evening. Seas: 1/1.5 metres. Swell: Southwesterly around 1 metre, increasing to 1/1.5 metres offshore. Saturday: Southerly 10/15 knots becoming variable about 10 knots early in the morning then becoming southerly 15/20 knots in the middle of the day. Seas: Around 1 metre, increasing to 1.5 metres during the afternoon. Swell: Southwesterly 1/1.5 metres, increasing to 1/2 metres, then decreasing to 1/1.5 metres by early evening. Outlook Sunday: Southerly 15/20 knots. Seas: 1.5 metres, decreasing below 1 metre during the morning, then increasing to 1/1.5 metres by early evening. Swell: Southwesterly 1/2 metres, decreasing to 1/1.5 metres around dawn, then decreasing to around 1 metre during the afternoon. Outlook Monday: East to southeasterly 15/20 knots turning south to southwesterly 10/15 knots during the morning then decreasing to about 10 knots during the afternoon. Seas: 1/1.5 metres, decreasing below 1 metre during the morning. Swell: South to southwesterly 1/1.5 metres, decreasing to around 1 metre during the afternoon.Issued Fri 16:01 WST
04:14 EDT It's not easy to get a sense of just how powerful a typhoon, cyclone or tornado will be.