The most notorious Tasman Low was the system that created havoc for the Sydney to Hobart race of 1998, with extreme winds and possibly the largest recorded wave of all time.

The first Tropical Cyclone for season 2006/2007 developed around 880km E/SE of the Solomon Islands on Sunday morning.

A Tropical Low over the Coral Sea is undergoing the early stages of cyclogensis, and is expected to develop into a Tropical Cyclone over the next 24 hours.

It is likely that Puerto Escondido had sets of at least 15-20ft.

A quick glance of the current forecast charts reveals two strong systems lining up off New Zealand's East Coast.

An incredible low pressure system has developed south of the Great Australian Bight over the past 24 hours, and is expected to generate one of the largest swells in years for the Southern Australian coastline.

But after a spell of nor'easters along the East Coast, the water temperature will often drop a couple of degrees. Why is this so?