Header for Return Periods Page

NOAA Atlas 2 is a precipitation-frequency document defining the return periods for 2, and 100 years, and 6 and 24-hour precipitation return periods. For more information on return periods, see the web site for the Hydrometeorological Design Studies Center



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2 Year - 6 and 24 Hour Return Periods
2-year 6 hour return graph2-year 24 hour return graph
100 Year - 6 and 24 Hour Return Periods
100-year 6 hour return graph100-year 24 hour return graph