WS of the sky and thin layer of clouds. Narrator explains the air has something to say about our weather too. WS of weather man crawling, holding a sounding balloon, coming out of white doors and building. These balloons will rise to heights of two miles. Shot from underneath a balloon with tiny radio transmitter. It travels upward and will send back signals at regular intervals. WS of directional antenna, which tracks the signals. MCU of a skilled observer showing variations and signals that can be recorded and calibrated. These then provide a picture of temperature, humidity, and air pressure in the atmosphere above. MCU of man holding balloon and letting go to determine the wind direction, air current and velocity above. These balloons carry no instruments and are released every six hours. MCU of a male observer using a device called a theodolite, that can follow the course of the balloon. WS of balloon in sky. From its drift, it tracks the course and velocity of the air currents through which it passes. MS of woman from the pacific coast weather girls, accumulating data. The information is promptly transmitted to other stations to the east. CU of typewriter with scrolling text, because the prevailing winds come from the west and travel east it might be their weather tomorrow or a week from now, and they need to know. MS of tilt up of ship and flag, for the same reason we want to know what the weather is doing west of us. MS of weather girl looking at data coming in on machines. So every six hours from radio and cable the reports come in a well established international weather code. Cuts to WS of a ship on the ocean, WS of airplane in the sky above clouds, WS of luxury liner on the ocean, and WS of an island outpost.