Using isobars on weather maps is completely accurate. Wind derives its initial speed and direction from changes in air pressure over distance, or pressure gradient force (PGF). This is why when ...

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 ...

The basic answer to this question is related pressure. Wind is simply moving air caused by differences in air pressure in the atmosphere. The difference in pressure over some distance is called a ...