You will find here short-term (one to four seasons), medium-term (one to two years), and long-term (three to five years) outlooks of worldwide dryness/wetness using DCV indices as the predictors and Standardized Precipitation-Evapotranspiration Index (SPEI) as the predictand.
You can find a detailed discussion on the methodology of the outlooks here.
Disclaimer: The CRCES climate and impacts outlooks/forecasts are experimental research products. Please see individual country’s national meteorological/climate service websites for their official forecasts (for example, the NOAA-Climate Prediction Center website for seasonal and other forecasts over the U.S.).