A warm front causes cloudy and rainy weather.
If warm air is advancing on cold air, the front is designated a warm front.
Warm air advancing on cold air can lead to cloudy and rainy weather.
What is most likely to result from warm air advancing on cold air?

  white outs
  energy of moving objects
  heat is produced
  a tree falling
  cloudy and rainy weather
  tsunamis
  freezing nitrogen
  kinetic energy