What do the weather symbols mean?
See link for the full set of National Weather Service station model symbols and their meanings. EDIT: The station model symbols are generally not used on the weather maps you see in the media. Some of the common map symbols include H and L for centers of high and low air pressure, respectively; lines with triangles and semicircles along them for different types of fronts (triangles = cold front, semicircles = warm front, both on same side of line = occluded front, both on opposite sides of line = stationary front); and symbols for different types of precipitation which can be different from map to map.