Developed by Princeton University’s Terrestrial Hydrology Group in collaboration with UNESCO IHP, G-WADI secretariats and members, regional centers, the African Flood and Drought Monitor (AFDM) monitors and forecasts meteorological, agricultural and hydrological drought at various temporal and spatial scales. It also has a multi-decadal, historical reconstruction of the terrestrial water cycle against which current conditions can be compared.

http://stream.princeton.edu/AWCM/WEBPAGE/interface.php?locale=en