Excessive precipitation

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excessive precipitation

Precipitation (generally in the form of rain) of an unusually high rate.

The expression is usually used qualitatively, but several meteorological services have adopted quantitative limits. In general, formulas for determining criteria for excessive precipitation take the following form:
ams2001glos-Ee64
where R is the amount of rainfall in t minutes, and a and b are constants. For longer storm periods, the expressions used are often of the type
ams2001glos-Ee65
where T is the time in hours.


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