The trough will slowly turn south on Thursday, and then hasten its southerly track during the day, with the axis expected south of Coffs by Thursday night and Forster by Friday morning.
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These small lows may move north, then east and finally south or may coalesce in a more classic Tasman Low or ECL variant. With so much uncertainty still around be prepared for major revisions as we move through the week. This is a nightmare to forecast!
We’ve got good model agreement now that through Mon we’ll see a deep trough develop from the Coral Sea down to a terminus somewhere on the MNC to lower North Coast with good odds we will see a surface low develop at that terminus.
Next week still looks dynamic with potential for a deep trough or low in the Tasman, although we are going to have to play it day by day due to poor model to model and run to run consistency
A broad trade fetch on steroids is now slowly breaking down through the Coral, Tasman and South Pacific with a tropical low whizzing away to the SE.
The dominant synoptic feature is a high pressure system in the southern Tasman Sea that’s directing a firm ridge over Northern NSW and SE Qld.
The Eastern seaboard is in between two large highs at the moment with a system near New Zealand still generating surf via a tradewind fetch and a new system moving through the Bight about to replicate it.
We’ll see the current dominant high (1034hPa) straddling New Zealand which is directing a broad trade fetch through the South Pacific and into the Coral Sea slowly migrate eastwards this week with an E’ly dip forming a trough of low pressure due E of SEQLD mid week.
Following a fun south-east pulse for the weekend, east energy ramps up later next week.
We’re seeing a ramp up in strong S’ly winds along the eastern seaboard as a dominant high (1035hPa) moves through the eastern Bight towards Tasmania with a trough on it’s leading edge moving northwards. Remnants of a low on the weekend are also sitting near New Zealand with swell generating fetches off the South Island and emerging from Cook Strait into the eastern Tasman.