Select categories to browse data

The National Weather Service's Climate Prediction Center (CPC) produces a Global Unified Daily Precipitation product from 1979-present.

The NOAA Climate Prediction Center (CPC) Standardized Precipitation Index (SPI) a probabilistic index derived from North American Multi-Model Ensemble (NMME) precipitation data computed for several time scales, ranging from one month to 24 months. The Subseasonal Weekly Forecasts are based on the 3-month SPI and are produced at 1- 2- 3- and 4-week time scales.

The Global Gridded Standardized Precipitation Index (SPI) is derived from the CMORPH daily dataset and includes timescales of 1, 3, 6 and 9 months.  The NOAA CMORPH precipitation dataset is a gridded dataset derived from combining numerous microwave-based estimates from low orbiter satellites. 

Global Historical Climatology Network (GHCN): an integrated database of daily climate summaries from land surface stations across the globe, including a common suite of quality assurance reviews.