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Pacific Islands Water Science Center
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Recent hydrologic conditions, Hawaii
Latest update November 2, 2015
Poamoho Rain Gage No. 1, Oahu
Data collected after November 5, 2014 are provisional and have not been reviewed or edited. They may be subject to significant change.
Poamoho rain gage no. 1 is at the crest of the Koolau Range above Wahiawa at an altitude of 2,480 ft (gage photo). The rain gage has been operated since 1967. The average yearly rainfall at the gage since 1967 is about 174 inches. Rainfall for October 2015 (25.0 inches) can be compared with island-wide rainfall data recorded by the National Weather Service. This station is operated by the Honolulu field office in cooperation with the State of Hawaii Commission on Water Resource Management and is equipped with a satellite transmitter delivering rainfall updates every hour (Go to real-time website for this gage).
Historical rainfall record
The monthly maximum and minimum data show how recent conditions compare to the range of monthly rainfall amounts measured in the historical record. The entire period of record is used to estimate the maximum, minimum, and mean monthly rainfall.
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