Because It Is Located at Middle Latitudes, the United States

Q20: When two air masses collide at a

Q21: The typical path of a winter mid-latitude

Q22: Cold fronts that move into the U.S.

Q24: Unstable air results from warm air above

Q26: Generally, the greatest lake-effect snowfall in the

Q27: Is it possible for a stationary front

Q28: An air mass is characterized by similar

Q29: A stationary front does not move because

Q30: The air pressure normally _ before a

Q40: Record breaking low temperatures are associated with