Would you like to receive an email of quarterly updates?

DATA CENTER

• Current conditions data
  • Streamflow
  • Groundwater
  • Water quality
  • Rainfall
  • Lake/Reservoir

• Historical data
  • Streamflow
  • Groundwater
  • Water quality
  • Rainfall
  • Annual data reports
  • Duration hydrographs
  • Instantaneous Data Archive (IDA)

• USGS WaterWatch
  • Current streamflow
  • Floods | Droughts
  • Water quality

• Groundwater Networks
  • Water level
  • Climate response

• Geospatial Information
  • National Geospatial Program
  • EarthExplorer
  • The National Map
  • National Hydrography Dataset
  • Watershed Boundary Dataset

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

Recent hydrologic conditions, Hawaii

Latest update February 5, 2013

Poamoho Rain Gage No. 1, Oahu

Data collected after October 17, 2012 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 173 inches. Rainfall for January 2013 (24.2 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.