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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

Queensland's weather outlook for summer forecasts fewer cyclones, more severe bushfires

00:06 EDT

Fewer cyclones are forecast but the Bureau of Meteorology (BOM) has warned a "dangerous cocktail" is brewing for the remainder of Queensland's fire season.

Fewer tropical cyclones, not necessarily weaker

14:53 EDT

The Bureau of Meteorology are tipping fewer tropical cyclones than usual during the upcoming Australian cyclone season, which starts next month.

Japan's flooding from space

10:06 EDT

Satellite images have revealed the scale of flooding in Japan as the clouds clear behind Typhoon Hagibis.