Compared to earlier model runs the trough and E’ly dip aren’t expected to form any major swell generating low pressure through the Coral Sea or South Pacific. The broad E’ly pattern which sets up in the Coral Sea gets disrupted next week by cold fronts but longer term looks to set up again as we move to the end of the month.
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Model divergence remains pronounced for the outcomes from this, with GFS still suggesting some kind of trough/easterly dip and enhanced E’ly swells. The European model has a more subdued outlook with a weaker high and trade-wind band remaining further north in line with seasonal norms.
On it’s own that will see a broad E’ly fetch develop likely in the New Caledonia quadrant, extending into the South Pacific slot. GFS adds to that recipe for a round of (sizey) trade swell with a deepening trough in the Coral Sea which spawns a surface low mid week, currently modelled to track southwards into the Tasman.
We've got a better angled pulse of S/SE energy for tomorrow with decent winds through the morning.
We’ll see the low move slowly out to sea later tomorrow and generate an initial pulse of local, directional S swell before moving further into the Tasman with better angled swells produced for later in the week.
The story of next week is still a stalled low in the Tasman- although swell potential gets a major upgrade as the low gets moving Tues into a swell producing position.
With the Tasman Sea inflamed by these robust S’ly fetches we’ll see strong S’ly swells in the short term, improving in quality as size eases from the proximate fetch and better quality swell trains fill in from below and adjacent to the South Island.
The energy cranks right up Wed as strong winds to low end gales develop off the NSW South to Central Coast and into the Tasman.
We’ve currently got a deep polar low with two strong embedded fronts tracking NE into the lower Tasman. High pressure moves up over NSW with easing pressure gradients while a trough deepens off the QLD coast and drifts south over the weekend.
A strong cold outbreak has led to the formation of a winter-calibre low in the Tasman (984hPa), backed by a strong, slow moving high in the Bight. We’re seeing the formation of strong S swells from this system, which will peak tomorrow then ease with a following front and deep low well to the south providing a strong S groundswell over the weekend under light winds.