A troughy pattern exists through the Northern Tasman down to the South Coast with the remnants of TC 10P (named by JTWC but remained a cyclone for less than a day) drifting in a SW direction from out near New Caledonia as a weak sub-tropical low. A small low pressure cell near the South Coast is slowly drifting south leaving a variable flow in it’s wake across the f/cast region.
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In the Coral Sea a depression on the end of the Monsoon Trough is organising with a high likelihood of forming a tropical cyclone (TC Freddy) - this is looking like a handy swell producer for sub-tropical areas although no real size is expected as the system weakens as the swell producing fetch moves into the swell window.
The Monsoon trough remains active but low-pressure systems budding off the trough line slide away to the SE in the absence of a strong supporting high, reducing surf potential until a system stalls near New Caledonia over the weekend/early next week.
We’re in a bit of Groundhog Day pattern with another weak high moving into the Tasman, directing onshore winds across the Eastern Seaboard. These winds are tending NE through temperate NSW, more E’ly in the sub-tropics. Tradewinds in the Coral Sea will see continuing small, Summer surf until a S’ly change later in the week brings a new S-SSE swell pulse.
We’ve got a weak, blocking pattern with high pressure (1025 hPa) right smack bang in the middle of the Tasman directing an onshore flow along the Eastern Seaboard. NE across Temperate NSW and SE-E in the sub-tropics. Warm SST (sea surface temperatures) are helping morning land breeze development so conditions should be relatively clean through the early sessions.
An insipid Summer blocking pattern is now setting up as a weak high (1019 hPa) moves East of Tasmania and becomes semi-stationary in the Central/Lower Tasman. That will see a short/medium term pattern of onshore winds and small summer surf becoming established.
We currently have a weak, troughy pattern in the Tasman Sea, with continuing instability across the tropics in the wake of an active, monsoon pattern. High pressure is expected to drift south of Tasmania this week, with a typical Summer SE wind pattern becoming established. Remnants of low pressure near New Zealand are offering up minor fetches out of Cook Strait (currently) and near the South Island which will supply a few small pulses of swell this week.
Generally speaking the leftover E’ly flow in the South Pacific looks weaker and less persistent and thus residual E’ly swell will likely fade in the mix faster than Wed’s notes suggested.
After a very slow moving synoptic pattern in the Xmas-New Years week we are finally seeing some movement as the tropical low which hived off the monsoon trough now journeys into the Southern Tasman, leading to easing swells across the region, where it will merge with a surface trough currently working it’s way north along the NSW Coast.
A tropical low which hived off the monsoon trough and which has been providing days of chunky E swell to sub-tropical regions is now, finally, on the move. Compared to model runs the system has been much more slow moving than f/cast- which is maintaining plenty of strong E swell across our sub-tropical region.