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Pacific Islands Water Science Center
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Recent hydrologic conditions, HawaiiA summary of recent rainfall, streamflow, and groundwater conditions in Hawaii is provided below. These web pages are prepared in collaboration with the Hawaii State Commission on Water Resource Management and the County Water Departments and provide water-resource managers, scientists, and the public with timely information on the status and trends of hydrologic conditions in Hawaii.
Kauai--Above-average rainfall. During August - October 2015, rainfall was about 135 percent of average. As of October 2015, rainfall near the summit of Mt. Waialeale on Kauai was below average 9 of the last 12 months. During November 2014 - October 2015, rainfall was about 83 percent of average.
Oahu--Above-average rainfall. During August - October 2015, rainfall was about 205 percent of average. This was the wettest October and wettest Aug-Sep-Oct since measurements began in 1967. As of September 2015, rainfall at Poamoho, near the crest of the Koolau Range on Oahu, was below average 7 of the last 12 months. During November 2014 - October 2015, rainfall was about 108 percent of average.
Maui-Below-average rainfall for October. Rainfall during October was about 94 percent of average for October. Rainfall data at Puu Kukui, the summit of the West Maui Mountains were not available due to equipment malfunction during May to August.
Links to USGS WaterWatch for current streamflow conditions in Hawaii. Links open in a new browser window.
Information from the USGS on groundwater and drought.
Links to USGS Groundwater Watch for current water-level conditions in Hawaii. Links open in a new browser window.
Water level network map-- shows recent groundwater levels compared to historical monthly mean groundwater levels. A list of wells in the network and links to available data and statistics are provided below by County
In addition to the USGS streamflow, groundwater level, and rainfall data for the sites shown above, the National Weather Service, Weather Forecast Office in Honolulu provides rainfall hydrology data and graphics for Hawaii.
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