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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

Cyclone Debbie: BOM downgrades storm as road access cut to three towns

09:33 EDT

Damage from Cyclone Debbie has cut all roads to the north Queensland towns of Bowen, Airlie Beach and Proserpine, but there have been no reports of injury from Daydream Island in the Whitsundays, Premier Annastacia Palaszczuk said this morning.

Cyclone Debbie downgraded to tropical low, affected areas 'like a war zone', live blog

09:27 EDT

Queenslanders have woken up to assess the damage left behind by Cyclone Debbie, which has weakened to tropical low.

BOM warns of flooding in Cyclone Debbie's wake; Brisbane set for pounding

09:21 EDT

Ex-Cyclone Debbie is causing monsoonal rain and major flooding across central Queensland, with the deluge set to hit Brisbane on Thursday.