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Hourly Precipitation Data

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*These states are combined for the New England publication starting at various timeframes. When you order these individual states, you may receive a New England publication (consisting of the states Massachusetts, New Hampshire, Rhode Island, Maine, Connecticut and Vermont).
**These states are combined for the Maryland/Delaware publication starting at various timeframes. When you order these individual states, you may receive a Maryland/Delaware publication (consisting of Maryland, Delaware and District of Columbia).
+These states are combined for the Alaska/Hawaii/Pacific Islands publication starting at various timeframes. When you order these individual states, you may receive a Alaska/Hawaii/Pacific Islands publication (consisting of Alaska, Hawaii and Pacific Islands).
++These states are combined for the Virgin Islands/Puerto Rico publication starting at various timeframes. When you order these individual states, you may receive a Virgin Islands/Puerto Rico publication (consisting of Virgin Islands and Puerto Rico).

Description

This publication contains hourly precipitation amounts obtained from recording rain gages located at National Weather Service, Federal Aviation Administration, and cooperative observer stations. Published data are displayed in inches to tenths or inches to hundredths at local standard time. HPD includes maximum precipitation for nine (9) time periods from 15 minutes to 24 hours, for selected stations.

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Period of Record

Hourly Precipitation Data publication period of record begins October 1951. In some rare cases, there are gaps in the archives available. Over the years that Hourly Precipitation Data has been produced, there have been changes, improvements, and additions to the monthly publications. Also, the climatic stations available today have not always been available for publication.

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HPD Publication Sample

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This is an example of a modern HPD Publication.

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