Air pressure, exactly what is it? Many people are impacted when the air pressure really drops and we’re going to have a drop in air pressure on Tuesday. This will be the lowest air pressure of the ...

This is an air pressure forecast, showing the forecast pressure (in inches of mercury), similar to what a barometer would show in the future.

Understanding atmospheric pressure is vital, newsroom meteorologist Justin Ballard said, because those giant H’s and L’s representing high and low air pressure systems on a weather map are meaningless ...