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'.
Vast areas of Queensland have experienced the hottest May night since records began, some of which stretch back to the 1800s.
For the majority of Australia April was warmer and drier than average.
Strong winds and heavy rain lashed parts of Victoria overnight, with hundreds of residents calling the State Emergency Service (SES) for help.