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Weather Glossary - Z



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.


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

Victorian desalination plant could be used for first time to cope with hot summer

19:22 EDT

Victoria's multi-billion-dollar desalination plant could be used for the first time, as the Andrews Government confronts a looming water crisis in drought-hit country towns.

Windy conditions to follow the warmth in QLD

17:58 EDT

Early spring warmth will come to an end as the Queensland coast is in for a breezy few days.

Tasmanian farmers say the lack of good rainfall is serious

15:50 EDT

The dry season through Tasmania's midlands, east coast and south-east is becoming a serious situation according to Coal Valley farmer, Justin Nichols.