ISOBARS

This is a fairly simple but good map of Australia illustrating isobars and a few other weather symbols. The black contour lines labeled with numbers are connecting points of equal pressure across the map. The image came from the Australian Government website and is a clean, easy to read, representation of the weather leaving off an unnecessary detail to jumble the map. The little barb like symbols indicate wind direction and speed while the cross hatching reflects rainfall in the past 24 hours. Where the isobars are close together, change in the variable is larger and generally the winds are stronger. Around the high pressure systems the pressure is increasing quickly but around the lows the change is gradual. It looks like the four pressure systems and land mass are greatly influencing the wind patterns.

Link to website source:
http://www.bom.gov.au/info/ftweather/page_7.shtml