U.S. Air Force Tech. Sgt. Tyrome Conyers, 1st Operations Support Squadron assistant section chief, uses a manual observation tool at Langley Air Force Base, Va., Feb. 6, 2015. Weather personnel use a Kestrel 4000 hand-held weather meter to monitor meteorological conditions including wind speed, temperature and atmospheric pressure. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)