Weather Glossary - Z
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'.
Canberra has shivered its way through the most cold nights since 1997 and its wettest winter since 2005.
It's the weather phrase that makes the coastal dwellers of New South Wales shudder - East Coast Low.
For most people, spring brings the hope of warm weather.