Question: what tools are used to predict droughts?
Answer: Drought Monitor. University of Nebraska - Lincoln. ... 
National Integrated Drought Information System (NIDIS) DOC . ... 
Evaporative Stress Index. USDA . ... 
Evaporative Demand Drought Index (EDDI) Earth System Research Laboratory. ... 
Advanced Hydrologic Prediction Service. ... 
North American Drought Variability. ... 
Water Watch. ... 
Crop Weather.