Any time the droplets in clouds grow and come together to form drops that are large enough to create a speed of falling that is greater than the speed at which the cloud is blowing upward, then they head downward, and if they make it down without evaporating, people on the ground experience them as rain or snow. Sometimes rain evaporates again and heads back up into the clouds. The greater the amount of water vapor under the cloud and the stronger the winds on the updraft, the more likely precipitation becomes.Know More
If there are clouds out and about but no rain, then the cloud lacks enough water vapor to form the precipitation or the cloud doesn't have enough rising motion inside of it. When air masses are warmer, rain usually takes place inside localized clouds featuring harder updrafts. When air masses are cooler, rain or snow happens within low pressure zones hosting larger cloud systems, generally appearing at the edge of cold and warm air masses.
Because the Earth is a closed system, the precipitation that takes place each year equals the amount of evaporation. Rain or snow always begins as water vapor that evaporates upward from the planet's surface.Learn more about Rain
Precipitation occurs when moist air rises to cooler altitudes, condensing the water out of the air into droplets. Once these droplets become heavy enough, often by coalescing around motes of dust or other particles, they fall out of the cloud as precipitation. Without significant updrafts bringing more moisture to the cloud layer, the condensed water may remain light enough to stay aloft, which is why not every cloud brings rain.Full Answer >
The smell of rain is unmistakable, and there are many factors that make up its sweet, earthy scent. It comes mostly from rainwater falling on dried materials, bacteria, or algae on the ground. There is also evidence that some people can smell the rain not only after it’s gone but before it comes.Full Answer >
Rain falls when atmospheric water vapor falls under gravity. In other words, when the water vapor in the atmosphere becomes too heavy, rain falls.Full Answer >
As of 2014, the rainiest place in the world is Mawsynram, Meghalaya State, India, with about 467 inches of rainfall every year. This small mountain community is soaked during monsoon season every year, with about 90 percent of their annual rainfall falling at that time.Full Answer >