Rain

Hello,
Rain is liquid precipitation. We can use rain gauge to measure the rain precipitation. Rain can be divided into 6 types when classify according to the amount of precipitation. First is when the precipitationrate is less than 0.25mm/hour it wiil be a very light rain. Second, light rain happen when the precipitation rate is between 0.25 mm/hour - 1.0 mm/hour. Then, when the precipitation rate is between 1.0 mm/hour - 4.0 mm/hour it is called moderate rain. Heavy rain will happen when the precipitation rate is between 4.0 mm/hour - 16.0 mm/hour. While very heavy rain have a precipitation rate in between 16.0 mm/hour - 50 mm/hour. Finally, when the precipitation rate is more than 50.0 mm/hour it maybe will cause of flood because it called extreme rain.
Thanks.

Source:http://en.wikipedia.org/wiki/Rain