North to northeasterly 15/25 knots shifting south to southeasterly 15/25 knots in the morning, increasing to 20/30 knots in the afternoon. Seas: 1/1.5 metres, increasing to 1/2 metres during the afternoon. Swell: Easterly around 1 metre. Weather: The chance of thunderstorms offshore south of Port Stephens, extending throughout. Outlook Sunday: South to southeasterly 15/20 knots tending east to southeasterly 10/15 knots during the afternoon and evening. Seas: 1/1.5 metres, decreasing below 1 metre during the morning. Swell: Easterly below 1 metre. Weather: The chance of thunderstorms, contracting north of Norah Head in the afternoon. Outlook Monday: Southeasterly 10/15 knots becoming easterly about 10 knots during the evening. Seas: Around 1 metre. Swell: Easterly below 1 metre. Weather: The chance of thunderstorms.Issued Sat 01:37 EDT
04:14 EDT It's not easy to get a sense of just how powerful a typhoon, cyclone or tornado will be.