Weather Glossary - Z

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Zephyr

A light, warm breeze. Derived from Zephryros, the personification by the ancient Greeks of the warm west wind that was thought to prevail around the time of the summer solstice.

Zonal flow

Large-scale atmospheric flow in which the east-west component (i.e., latitudinal) is dominant. The accompanying meridional (north-south) component often is weaker than normal. Compare with meridional flow. Weather systems tend to move past quickly in a zonal flow regime.

Zulu

Greenwich Mean Time (GMT). Centred on zero degrees longitude. For scientific purposes this time zone is also known as Universal Time (UTC). All meteorological observations worldwide are reported using this time (for ease of comparison and computation). This timezone is commonly suffixed with 'Z'.

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Victoria coastline faces giant waves, dangerous surf as Bells Beach readies for big swells

13:26 EST

Surfers at the Bells Beach tournament are battling a challenging swell as forecasters warn a storm surge on Friday afternoon could bring waves of up to 15 metres in open waters off the Victorian coast.

Hobart news: Senator's choice of One Nation preferences questioned, public land could be up for sale in Glenorchy

12:53 EST

This is the Tasmania Now daily blog, bringing you updates from across the island state and beyond.

Sydney's record late-season warm spell about to end

11:28 EST

Sydney prolonged run of pleasant weather during the last couple of weeks was also the city’s warmest fortnight this late in the season on record, based on consecutive maximum temperatures.