Yet another inland trough forms an interior low mid-week, likely in Southern NSW, and this low is looking like a solid S-SSE swell producer as it moves offshore Wed/Thurs and becomes cradled by a strong high moving well south of the Bight. It’s not the type of pattern we would expect to see in late Sep, but with so much La Niña mediated troughiness in the Tasman, it’s just been a matter of time until something kicked off.

The complex low and huge trough line (extending across most of Australia!) are still tracking across the interior as forecast, with a high in the Tasman generating a NE flow across the majority of the Eastern Seaboard. The pressure gradient is tightened as the low approaches with an increase in NE winds and swell expected through the end of the week.

Still, no major change to the weekend f/cast. A complex low linked to multiple troughs and cold fronts is now approaching from SW of Tasmania. A main coastal trough linked to an Indian Ocean NW cloud band is clearing the area with a mostly offshore flow across the weekend and no major swell sources on tap. 

A strong, but decaying cold front tied to a mid-latitude low is pushing gales through a wide swathe of the lower Tasman, with a handy S swell now being generated for the region. A relatively weak high (1025hPa) is pushing though the Bight with a transitory ridge, quickly breaking down and tending N’ly mid week , before another mid-latitude low pushes through and brings a NW to W’ly flow across the weekend.