You can begin your analysis anywhere, but it may prove easier if you start in an area of numberous reports.
Most analysts begin over a continental area and proceed to later cover the adjacent ocean.
Smoothing of isobars. After you ve chosen an area in which to start, your next step is to select an isobar to draw. Again, the choice is yours. Many analysts like to begin with a specific isobar, the 1016 often being preferred. They feel it outlines more pressure systems than any other isobar when completed.