Step 1: Isobars. Locate all points of 1024 millibar (mb) pressure in the northwest United States. Similar to a dot-to-dot coloring book, use a black pen to connect all four of the 1024 mb points. Your line should
start and end at the point of 1024 mb pressure in Utah. Repeat this procedure with the next isobar value
until all the points on the map have isobars running through them. Be sure that no set of isobars crosses
another. Remember that not all isobars will be closed circles, Label each of your lines with the last two
digits of the pressure reading (24, for example)