An atmospheric sounding is a graphical representation of the atmosphere's vertical profile, showing how temperature, dew point, humidity, wind direction, and speed vary with altitude. It is obtained by launching a radiosonde attached to a balloon that ascends from the surface to the stratosphere (25–30 km), transmitting data every second by radio. The sounding is plotted on a thermodynamic diagram (Skew-T/Log-P, Stüve, or emagram) where the horizontal axis shows temperature and the vertical axis pressure (altitude). The air temperature curve and dew point curve reveal crucial information: when both lines are close together, the air is nearly saturated (clouds likely); when they diverge, the air is dry. Convective Available Potential Energy (CAPE)—the area between the sounding curve and the ascent path of an air parcel—indicates thunderstorm potential: values exceeding 1,000 J/kg signal strong convection. The global sounding network (coordinated by the WMO) conducts launches at 00 and 12 UTC from approximately 800 stations worldwide. Sounding data directly feed weather models and are essential for predicting wind shear, atmospheric stability, and severe weather risk.