Question: What are constant pressure charts? Answer: Constant pressure charts like the 500 mb chart shown below may seem obvious to interpret. It has many features similar to what you might see on ...

A map illustrates lines of surface pressure, called isobars, with areas of high and low pressure marked for March 14, 2025. Winds are strongest when isobars are packed closely together.

Pressure that is greater than the standard atmospheric pressure of 1013.25 mb is classified as high pressure and pressure that is lower than 1013.25 is classified as low pressure. On a weather map ...

In meteorology, high pressure always flows to low pressure ... On the weather map, the pressure lines or “isobars” will be ...

How high and low pressure relate to wind. Thankfully, Earth is vastly different. We live on a constantly rotating, tilting sphere with large variations in land elevation and vast oceans.