13. The highest surface wind speeds occur when there is a A) 4-millibar air-pressure difference between two nearby locations B) 4-millibar air-pressure difference between two distant locations C) 20-millibar air-pressure difference between two nearby locations D) 20 -millibar air-pressure difference between two distant locations

The highest surface wind speeds typically occur when there is a significant pressure difference over a short distance. This is due to the steep pressure gradient that causes air to rush from high-pressure areas to low-pressure areas rapidly. In practical terms, meteorologists often focus on the pressure gradient when predicting storm systems. For example, when a cold front moves in, the pressure drop can be drastic, resulting in strong winds that can lead to severe weather conditions, such as thunderstorms or even tornadoes. Understanding these wind patterns is crucial for safety, transportation, and even outdoor activities!