KADENA AIR BASE, Japan -- Staff Sgt. Sara Klobucar, 353rd Operations Support Squadron weather technician, prepares a radiosonde before attaching it to a helium-filled weather balloon here Oct. 27. The radiosonde measures pressure, temperature and relative humidity as it ascends into the atmosphere; and sends the data back to the MW31 sounding system every one to two seconds. The data provides valuable input for computer forecast models, local forecasts and future weather research. (U.S. Air Force photo by Tech. Sgt. Aaron Cram)