The document describes the Desert Locust Global Early Warning System which uses Rv4 GIS software and SWARMS GIS to collect and analyze locust survey and control data from over 50 countries. The system provides monthly bulletins, 6-week forecasts, updates, warnings and alerts. It utilizes data on rainfall, greenness, precipitation anomalies, temperature anomalies and soil moisture from various sources. Models in the eLocust3 platform analyze the data to generate 15-day swarm trajectory forecasts and weekly swarm dispersal forecasts. Over 400 teams monitor locust activities during recessions and over 2000 teams respond during invasions.