The Bureau of Meteorology has warned that potentially record sea levels and extreme weather conditions this evening may lead to flooding of low-lying coastal areas.
The bureau issued the warning early this morning and predicts weather conditions affecting southeastern NSW to extend through to the Mid North Coast by tonight.
The warning encourages Hunter residents to prepare for damaging wind, heavy rain, abnormally high tides and very heavy surf as a coastal low gathers strength.
Inland, the bureau has issued a blizzard warning and warned that alpine peaks may experience peak wind gusts of 120kmh
Major communities to be affected by this system include:
* Bombala, Eden, Merimbula & Batemans Bay,
* Wollongong (from Tuesday morning),
* Sydney (from later Tuesday afternoon)
* Central Coast and Newcastle (by Tuesday evening).
* Old Bar (from Tuesday night).
The weather phenomenon is the same type that created the destructive storm that grounded bulk carrier the Pasha Bulker at Nobbys Beach on June 8, 2007.