Wind is the air at the equator is hot and the air at the poles is cold, when warm air rises cold air rushes in to fill the empty space. We call this wind. In Ontario, our prevailing winds come from the West! Air masses are Large bodies of air, warm masses from the equator, and cold masses from the poles, air masses that come from over the water tend to be warmer and wetter. When cold and warm air masses meet, the warm air is forced up the air rushes in to fill the space, and the warm cools, condenses, and precipitates. The rotation of the earth causes air masses to spin. Because the equator is moving faster than any other part of the planet. If air is moving North away from the equator it will veer East because it is travelling slightly faster than the earth beneath it. So hurricanes or storm systems in the Northern Hemisphere usually spin counterclockwise.
