National Weather Service United States Department of Commerce
Our website addresses are changing and you will need to update your bookmarks. This server will be decommissioned on May 30, 2019. See https://www.weather.gov/media/notifications/scn19-17pr_migration.pdf for details. This page's new url is https://www.weather.gov/hfo/spi_web_page.

SPI Information: What is the SPI?

Latest SPI maps: Updated Mar 07, 2019 for data through Jan
Note: SPI zone definitions for each map are based roughly on climatological differences. Most zones are represented by a relatively small number of gages so oversimplifications of actual conditions will occur.
Kaua'i: 3-month | 6-month | 12-month
O'ahu: 3-month | 6-month | 12-month
Maui: 3-month | 6-month | 12-month
Big Island: 3-month | 6-month | 12-month

SPI Data tables
"Quick-look" data set: Updated Mar 07, 2019 for data through the end of Feb 2019
Full data set: Updated Mar 07, 2019 for Jan 2019
Micronesia and Samoa data set: Updated Mar 07, 2019 for data through the end of Feb 2019

SPI Rain Gage Locator Maps
Kaua'i | O'ahu | Maui | Big Island