Cold fronts: Thunderheads can form as the moisture in the warm air mass rises, cools, and condenses. As the front moves through, cool, fair weather is likely to follow.

Warm fronts: A warm front brings gentle rain or light snow, followed by warmer, milder weather.

The water cycle starts with evaporation. Water absorbs heat energy from the sun and turns into vapors. As water vaporizes into water vapor, it rises up in the atmosphere. At high altitudes the water vapors changes into very tiny particles of water droplets because the temperature at high altitudes is low. This process is called condensation. These particles come close together and form clouds and fogs in the air. Sublimation is a process where ice directly converts into water vapors without converting into liquid water. The clouds then pour down as precipitation due to wind or temperature change.

Weather

This occurs because the water droplets combine to make bigger droplets. Also when the air cannot hold any more water, it precipitates. As water precipitates, some of it is absorbed by the soil. This water enters into the process of transpiration. Transpiration is similar to evaporation where liquid water is turned into water vapor by the plants. As the water pours down it leads to runoff. Runoff is the process where water runs over the surface of earth. As water runs over the ground it displaces the top soil. Some of the water that precipitates does not runoff into the rivers and is absorbed by the plants or gets evaporated.This is called infiltration.

Rain, snow, hail and sleet. are the different types of precipitation.