Weather Glossary - Other

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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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Wintery chill for Perth

11:56 AEST Those in Perth will have woken up to a chilly one this morning, with the cities' temperature falling to a cool 3 degrees overnight in the wake of Friday's strong cold front.

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