Weather balloon Weather balloon A weather or sounding balloon is a balloon (specifically a type of high-altitude balloon) that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde. To obtain wind data, they can be tracked by radar, radio direction finding, or navigation systems (such as the satellite-based Global Positioning System, GPS). Balloons meant to stay at a constant altitude for long periods of time are known as transosondes. Weather balloons that do not carry an instrument pack are used to determine upper-level winds and
Antarctica Weather Danger Classification reaching Condition 2 based on windchill values of or below do happen. And reaching Condition 1 based on windchill values of or colder does occur. Antarctica Weather Danger Classification The weather in Antarctica can be highly variable, and weather conditions will oftentimes change dramatically in a short period of time. There are various classifications for describing weather conditions in Antarctica; restrictions given to workers during the different conditions vary by station and nation. An air temperature of or below would meet the criteria for Condition 2. And an air temperature of or colder would meet the criteria for Condition 1.