The Helicopter Emergency Medical Services (HEMS) Weather Tool is a valuable weather reporting system specially designed to meet the needs of air emergency first responders. It runs as a desktop application on a computer that allows operations to overlay multiple weather conditions at low altitudes: ceiling height, visibility, winds, relative humidity, temperature, and radar images. All 3D data are provided at ground-level altitudes and can be sliced horizontally on 500 ft intervals up to 5000 ft., and can be animated in real time.