"Mate, I lost about 100 heartbeats I reckon in that split second, and got a few more grey hairs."

Gusty winds buffeted parts of Sydney late on Tuesday as a band of dry thunderstorms moved across parts of eastern NSW.

Melbourne is bracing for flooding as a huge storm moves across the state, with falls of 50 milimetres in the city's north-east suburbs likely on Saturday morning.

This weekend is set to be another warm, muggy one - and next weekend may be much the same.

Slow-moving Typhoon Hagupit has weakened as it churns across the central Philippines islands, easing fears of widespread mass destruction, but officials warn the storm could still bring severe flooding to the low-lying capital Manila.