A low pressure system sitting near Lord Howe Island has a reasonable belt of easterly winds on its southern flank, generating new E'ly swells across the region.
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We’ve got reasonable model agreement now on the trough of low pressure in the Tasman early next week. A broad area of low pressure drifts NE to be close to Lord Howe Island on Mon, with ESE-E winds on the southern flank of the low pressure area. That system does look to persist in the Tasman at least until the middle of next week, generating fun sized SE-E swells.
The complex low pressure gyre is slowly moving under Tasmania with the majority of any swell generating winds in the swell shadow of Tasmania. Hot air being dragged down from tropical Australia is now slowly being displaced by the cooler air from the Southern Ocean and driving a synoptic W’ly flow across temperate NSW with the sub-tropics still subject to hot, Spring-like N’lies.
Unfortunately this strong cold outbreak now looks to stall just too far West (behind the swell shadow of Tasmania) to really deliver any strong S swell to the East Coast, before weakening as it moves into the Tasman Sea swell window proper.
A weak ridge from a high (1023hPa) tracking towards Tasmania supplies weak breezes tomorrow, likely SW inshore early before tending light SE-NE through the day. A continuing mix of S swells, mostly mid period from the frontal progression below Australia supplies some 2-3ft surf at S swell magnets, smaller elsewhere.
Lots of action on the charts but not much of it will translate to meaningful surf for the Eastern Seaboard. The tropics remains active with a monsoon trough and convective activity strewn across the Top End, while the edge of the trough in the South Pacific has spawned TC Judy, with another system behind it. Both of those systems are now modelled to track quickly SE through the swell window with no major swells generated.
The troughy pattern will see rapid fire wind changes across temperate NSW this week and while all eyes are on the tropics it’s looking like a continuing tease with an expected tropical depression or TC moving quite quickly SE through the swell window with limited surf potential.
Models are now firming on a large tropical depression (possibly a TC) drifting southwards into the slot between New Caledonia and the North Island from mid next week. A broad, slow moving area of E’ly low end gales is likely on the southern flank of this system, initially favouring the sub-tropics, but radiating down to temperate NSW through next weekend.
Strong high pressure (1035 hPa) is now moving SE of Tasmania with an embedded trough along the advancing ridge ramping up wind speeds from the SSE-SE into the 30kts+ range. Conditions should settle as the high moves into the Tasman and weakens and the ridge relaxes through the end of the week.
The models aren't picking it up well but I'm still expecting an interesting long period south swell to glance the coast tomorrow.