excessive precipitation

From Glossary of Meteorology
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.
Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact [email protected]. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.