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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

Sydney's cold mornings to continue

15:40 EST

On Saturday morning Sydney awoke to its coldest morning of the year so far, at just seven degrees it was a good day to sleep in.

Canberra slow to thaw after frozen fog of a morning

15:29 EST

Canberra took until brunch to shake off the frozen fog which had blanketed much of northern ACT just before sunrise when it had chilled to minus five degrees.

Frozen knees and numb fingers: A photographer's pain to capture the perfect frosty morning

08:24 EST

Chris McFerran admits he may be in a very small minority when it comes to wishing for forecasts of sub-zero temperatures and thick fog.