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'.
A dangerous trough and cold front is approaching south-west Western Australia, the Bureau of Meteorology (BoM) has warned.
While much of Australia's mainland sits under a high pressure system, it's a different story for Tasmania.
Most of Hobart's Myer store could be open within days but it faces "devastating" stock losses and damage, manager Peter Monachetti says.