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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

Heatwave to scorch Queensland 'well into next week', BOM warns

18:22 EDT

Temperatures will remain above 40 degrees Celsius in parts of central and southern Queensland until at least Wednesday next week, the Bureau of Meterology (BOM) warns.

Do you know the signs of heat stress?

17:26 EDT

Hot weather can take a serious toll on our health.

Extreme heatwave sparks total fire ban in NSW

16:01 EDT

The sort of temperatures that see roads melt and cold taps flowing with boiling water are set to scorch Sydney and northern New South Wales over the next few days with the weather bureau officially forecasting a rare "extreme heatwave".