Another small-scale experiment anyone can do is stand with his/her back against the wind, lower air pressure will be to the left in the Northern hemisphere. For example, if you hold a barometer with your back to the wind which is coming at you from the west, and your friend is around 50-100 miles north of you, you will see that your friend has a lower pressure reading. This is due to the fact that air moves counter-clockwise around a low pressure center(Coriolis Effect). This experiment is easier to observe with both of you on the same side of a frontal system.
I am happy to explain anything further.