Young Blonde Girl At The River In The Rain

When a precipitation measurement is made, various networks exist across the United States and elsewhere where rainfall measurements can be submitted through the Internet, such as CoCoRAHS or GLOBE. If a network is not available in the area where one lives, the nearest local weather or met office will likely be interested in the measurement.
One millimeter of rainfall is the equivalent of one liter of water per square meter. This makes computing the water requirements of crops simple.