We have a deep low (985hPa) adjacent to Tasmania and another attached low centre further E in the Tasman with the long E’ly infeed into this complex low gyre focussed near the west coast of the North Island aimed up at Tasmania.

We have a deep low (985hPa) adjacent to Tasmania and another attached low centre further E in the Tasman with the long E/NE infeed into this complex low gyre focussed near the west coast of the North Island and slowly sliding out of the swell window.

The trough block scenario is reaching maximum strength but moving southwards as it does so. We’ll see a slight kick in size tomorrow for CQ then waves steadily easing over the rest of the weekend, going back to tiny and then flat next week as a cold outbreak brings W’ly Simonds to the Coral Sea.

The circulation in the trough line has increased wind speeds in the fetch as the air mass moves from high to low pressure. As a result we’ll see an increase in wave heights and period through tomorrow.