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Routine Products

• Hawai`i Rainfall Summary (updated several times daily) | 90 day archive (8am bulletin)
• Daily Hawai`i Cooperative Observations | 30 day archive
• 24hr Precipitation Forecast issued daily M-F

Graphical Maps of Hawai`i Rainfall Summary

Updated every 3 hours

Additional Hydrology Resources

• Rainfall Summary Gage Location Maps:
  • Kaua`i
  • O`ahu
  • Moloka`i/Lana`i
  • Maui
  • Hawai`i
• ROSA cooperative observation location maps:
  • Kaua`i
  • O`ahu
  • Moloka`i/Lana`i
  • Maui
  • Hawai`i
• Rainfall Graphs
• Hydrology in Hawai`i
• Hydronet automated rain gage network
• Hydronet archived data (online)
• Monthly Precipitation Summaries
     Click to receive notifications of new summaries
  • Apr 2008
  • Mar 2008
  • Feb 2008
  • Jan 2008
  • Dec 2007
  • Nov 2007
  • Oct 2007
  • Sep 2007
  • Aug 2007
  • Jul 2007
  • Jun 2007
  • May 2007
• Standardized Precipitation Index (SPI) data for Hawai`i
     Click to receive notifications of new SPI information
• Daily Streamflow Conditions from the USGS