Weather forecast maps are in a sense a combination of various map types, but also a simplification of various map types. The actual process of mapping the weather is complex and requires a great deal of information. However, it must be shown in a way that's easy to view quickly for a forecast. The map above is from The Weather Channel and represents the sweeping weather trends across the United States. High pressure systems and low pressure systems, in addition to cold fronts and warm fronts are the focus of this map. Isobars are shown, but no values are shown with them, so they are not very useful. Patches of precipitation are also shown here. These types of maps are used for people to figure out what type of weather to expect in their region or other regions that they may be traveling to.
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