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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

Wet weather sees water allocations increase but waterlogging also on the rise

18:18 EST

South Australian River Murray irrigators have seen their second water allocation increase within a month.

Cut-off low on the cards for east coast

17:39 EST

Southeastern Australia is in for a wooly few days next week as forecast models begin to jump on the cut-off low bandwagon.

Tasmania weather: Hydro report finds cloud seeding had no effect on Derwent Valley flooding

17:29 EST

A report by Hydro Tasmania has found a cloud seeding operation carried out in June did not increase rainfall in the hours before major flooding.