What kind of weather would you associate with a high-pressure system? How does density, humidity, and air motion compare to that of a low-pressure system?

The origin of a high pressure zone will determine the type of weather to come. If a high pressure zone moves in from the south, the weather is usually warm and clear in the summer. However, a high pressure zone originating from the north will usually bring cold weather in the winter months.

Cooler air is dense and has more air molecules per unit of volume making it exert more pressure on the surface of Earth. Therefore, the weather in a high pressure zone is generally fair and cool. An approaching high pressure zone doesn't cause the stormy weather associated with low pressure zones.