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

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.