Things get interesting/dynamic from Tues. At issue is a trough and potential surface low in advance of a major high pressure ridge.
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Friday looks solid as a range of mid period and longer period S swell trains generated by the proximate and deep fetches make landfall.
Some frontal activity to the south is poorly positioned and aligned but we will see a stronger frontal intrusion into the Tasman later this week, although not with an accompanying Tasman low as suggested on Friday.
As the low moves offshore Fri odds are firming we’ll see a major S swell develop as gales develop on the western flank of the low, proximate to the NSW coast.
Plenty of action in the tropics and subtropics next week but we’ll see a quiet opening to the week for temperate NSW, with some model divergence for later next week.
Late afternoon, the leading edge of a new long period S’ly swell will make landfall, though we’re not expecting wave heights to peak until...
We’ve still got an intense Tasman low in the picture sending plenty of swell our way, located now off the west coast of the South Island, with a large slow moving high SW of WA and powerful fronts under the SE of the continent.
There’s currently a robust Tasman low, still intensifying, moving slowly SE off the Central NSW coast down into the Tasman Sea towards New Zealand. Gales to severe gales wrapping the SW flank of the low will supply plenty of strong, improving S’ly-SE'ly swell through the rest of the week.
That’s allowing plenty of space for low pressure development in the Tasman and as a front pushes through and combines with the remnants of a trough we’ll see a robust low develop through tomorrow, with gales expected close to the coast.
The moist onshore flow from this set-up is flowing into a coastal trough and interior low bringing onshore winds and rain. We’ll eventually see the low clear the coast bringing better winds Sun with some strong S swell pulses on the menu from Sun and into next week from Tasman Sea and deeper sources.