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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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Weather News

Weekend rainfall on the cards for hot and dry inland NSW

11:55 EDT

With a few days to go until the official end to the summer season, it looks like parts of New South Wales could still see the odd drop of rain.

Elevated fire danger ahead of seemingly benign cold front

11:19 EDT

A weak cold front will clip the southern parts of South Australia today and reach Victoria in the afternoon.

Authorities warn against swimming in Swan and Canning rivers after heavy rains, flooding

10:55 EDT

Heavy rainfall that caused flooding across southern Western Australia a week ago has filled Perth's river systems with sediment and nutrients, as well as potentially harmful bacteria.