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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WA storm prompts big clean-up as Perth dashcam video shows large tree crushing car

20:25 EDT

Dramatic footage has emerged of a lucky escape on Perth's roads during a destructive storm authorities have described as the most severe to hit the city in almost a decade.

BOM says ex-cyclone Esther could re-intensify as it loops across the north bringing heavy rains

18:39 EDT

Ex-tropical cyclone Esther is tracking an unpredictable path across northern Australia and could re-intensify later in the week, with the Bureau of Meteorology describing it as "a remarkable system".

Flooding in St George as Balonne River swells following Queensland rain

13:36 EDT

Swiftwater crews are on standby in St George in Queensland's southern inland, with dozens of homes in low-lying areas at risk of flooding from the rising Balonne River.