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540 line

Indicates the 540 decametre line on the 1000-500 thickness chart. Often used as a rough guide to determine when an airmass is cold enough to produce snowfalls on the Australian southern alpine areas.

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Weather News

Southerlies soak parts of VIC

13:38 EST

A moisture laden southerly flow directed by an East Coast Low interacted with an upper cold pool over parts of Victoria yesterday producing persistent and heavy showers.

Canberra's coldest winter since 2000

13:17 EST

Canberrans have endured a much harsher winter than any in the past decade.

PNG prime minister Peter O'Neill may review Australian food import ban amid drought

11:42 EST

Papua New Guinea's prime minister Peter O'Neill says he may review a recent ban on importing Australian fruit and vegetables into the country.