Precipitation Maps
Current Observed Rainfall
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Map Details
The Global Observed Rainfall image shows 24 hour precipitation totals for around the world. Rainfall is typically measured using a rain gauge. It is expressed as the depth of water that collects on a flat surface, and is routinely measured with an accuracy up to 0.1 mm or 0.01 in. Rain gauges are usually placed at a uniform height above the ground, which may vary depending on the country. There are two types of gauges. Storage rain gauges are used to make daily or monthly measurements. Recording rain gauges measure the intensity of rainfall using a tipping bucket which will only tip when a certain volume of water is in it. An electrical switch can be used to record the tips.
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