Hourly weather observations that include sea-level pressure are plotted or printed on weather maps. Isobars are drawn by connecting points having equal sea-level air pressure, using a specified ...

A bar is a metric unit of pressure and isobars are lines on a weather map that connect points of equal air pressure. Because variations in air pressure drive atmospheric winds, isobars give ...

Paris Alston: This is GBH’s Morning Edition. When trying to make sense of the weather and meteorological patterns, there are a lot of helpful tools out there. One of them is isobars, the curved lines ...