Weather occurs on multiple scales both spatially and temporally. At the lowest scale are the turbulent eddies that occur in the boundary layer which is what I research. This is called the microscale. What we normally think of as weather occurs at larger scales. The mesoscale includes weather systems such as thunderstorms which are on the order of tens to hundreds of kilometers. Then there are synoptic scale systems on the order of thousands of kilometers which are usually the low and high pressure systems that bring the weekly cycle of weather patterns to the mid-latitudes. Finally, there is the planetary scale which are associated with extremely large-scale waves the size of the circumference to a third of the circumference of the Earth that the synoptic-scale systems ride along.
I have made an effort here to follow that same pattern by classifying weather information on various scales roughly parallel to those given above—from the local scale, centered on Tucson since that's where I live, going outward to the global scale.