Erica's Answer:
When meteorologists look at these forecast maps, there are certain things that can indicate a windy day. For instance, it's often windy after a cold front passes. Also, if an area of high pressure is close to a center of low pressure, the land between those two pressure centers has windy conditions. We're looking for areas with a tight pressure gradient- that is the difference between high pressure and low pressure. A tight pressure gradient is easy to spot on a map when the isobars are drawn. Isobars, which are lines of constant pressure, will be close together when there is a tight pressure gradient. Winds are light in areas where the isobars are spread widely apart.- Erica
