An angled trough of low pressure forms off the NSW Coast o/night and quickly moves out into the Tasman Sea. Compared to Wed’s notes windspeeds look a smidge weaker, but the fetch forms a better aligned SE arm around the trough line through Sat.
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Strong winds to potential S’ly gales look to develop o/night Fri into Sat as the low pressure trough deepens offshore and a strong high moves into the Bight.
Small swells from this low will ease through the week with some deep polar activity sending more small S swell wrap up the Pipe before a stronger frontal intrusion this weekend brings a sizier S swell with plenty of S wind.
Mixed in with that will be a nice little boost in E-E/SE swell from fetches on the NZ side of the Tasman, holding into Sun, likely even increasing a notch from a broad fetch of winds infeeding into the developing low pressure trough.
The resulting high pressure ridge is leading to deep onshore flows and a trough along the coast is expected to move offshore Sun and form a broad trough of low pressure early next week. That should see improved conditions north of the low pressure trough.
Another week of onshore SE winds with a few favourable windows around rain squalls and troughy areas
In fact, it becomes reinforced by a new high and this peanut high straddling Tasmania will hold a firm ridge along most of the Eastern Seaboard with another working week of SE-E winds, gradually backing off into the weekend. A stalled trough looks to linger off the coast bringing plenty of unstable weather and possibly windows of lighter winds.
Monster high pressure has barely budged since Wed, maintaining a S-SE flow right up the Eastern Seaboard, with a coastal trough ensuring plenty of unstable, rainy weather.
A storm force polar low is better aimed at Pacific targets but we’ll still see some long period S groundswell from it this weekend, with the proviso that S’ly winds will remain persistent.
Later polar fronts in the far southern/central Tasman remain strong and although better aimed at Pacific targets we’ll still see some significant sideband S’ly energy from them.
Things get interesting/dynamic from Tues. At issue is a trough and potential surface low in advance of a major high pressure ridge.