How do cold fronts form?

How do cold fronts form?

Tue., Feb. 13 notes

The Science of Tornados from Ground Zero Storm Shelters

Fronts « KaiserScience

Lifting Along Fronts: when air masses interact

Cold Fronts 101

Freeze warning in effect tonight

Cold front - Wikipedia

Thu., Sep. 29 notes

What exactly is a Cold Front?

WeatherQuestions.com: What is a cold front / warm front?