Cut a vertical slit near the bottom. Then cut horizontal slits perpendicular to this cut at its end points - like an H on its side. In fact, these terms have their own specific meanings. A-B. Click on this site. Choose from the menu presented.
All weather forecasts begin with observations of what the weather is doing all over the world.
These observations are then fed into super computers that use mathematical models of the atmosphere to make predictions. The symbols on this map are very common. Click on the symbols to find out what they mean or click on the cities to find out about the weather there. The purpose of this module is to introduce air masses, where they originate from and how they are modified. Clashing air masses in the middle latitudes spark interesting weather events and the boundaries separating these air masses are known as fronts.