Winds shift W’ly as the initial frontal system sweeps across NSW tomorrow, with a stronger front and low moving up over NSW and then entering the Tasman with a vengeance into the weekend.

A new polar low will develop at very low latitudes on Wednesday, before rocketing up to the north-east, wrapping around the primary mid-latitude low on Thursday, reaching the SA coast sometime on Friday with gale force W/NW tending SW winds.

A large high (1036hPa) sits well to the west of the state and slowly moves towards the state while exerting a blocking pattern on upstream low pressure systems compared to the near past.

These low centres are focussing areas of E’ly to NE’ly infeed along the trough line- perfectly aimed at east coast targets all the way down to Tasmania.