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Precipitation is measured using a rain gauge, and more recently remote sensing techniques such as a weather radar. When classified according to the rate of precipitation, rain can be divided into categories. Light rain describes rainfall which falls at a rate of between a trace and 2.5 millimetres (0.098 in) per hour. Moderate rain describes ...
(The Heavy Rainfall Warning product issued by the Meteorological Service of Canada has a similar meaning as an NWS Flash Flood Watch.) [13] Particularly dangerous situation flash flood watch FFA – Conditions are favorable for an extremely elevated level of severe and life-threatening flash flooding beyond the level of a normal flash flood ...
A wake low or a mesoscale low-pressure area forms behind the rain shield (a high pressure system under the rain canopy) of a mature squall line and is sometimes associated with a heat burst. [40] Squall lines often cause severe straight-line wind damage, and most non-tornadic wind damage is caused from squall lines. [41]
A tornado is an example of an extreme weather event. This tornado struck Anadarko, Oklahoma during a tornado outbreak in 1999.. Extreme weather includes unexpected, unusual, severe, or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past.
Precipitation, especially rain, has a dramatic effect on agriculture. All plants need at least some water to survive, therefore rain (being the most effective means of watering) is important to agriculture. While a regular rain pattern is usually vital to healthy plants, too much or too little rainfall can be harmful, even devastating to crops.
One is a flash flood watch, which means that conditions are favorable for flash flooding, and the other is a flash flood warning, meaning that a flash flood is occurring or one will occur imminently and is usually issued when there are strong weather radar echoes for an area that is prone to flash flooding. [2]
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Average precipitation. The characteristics of United States rainfall climatology differ significantly across the United States and those under United States sovereignty. . Summer and early fall bring brief, but frequent thundershowers and tropical cyclones which create a wet summer and drier winter in the eastern Gulf and lower Eas