for example, has a massive network of over 100 spotters. In the Great Plains and Southern US, many stations hire or contract storm chasers to send severe thunderstorm and tornado imagery to their viewers and listeners. Some TV stations fly helicopters to record such weather. Aviation Accurate and timely weather information is crucial to safe flying operations. Large airports retain a staff of trained weather observers. Previously, many airports had such observers but automated systems replaced humans at most airports and airfields. The military, especially air forces and navies, also maintains such observers. See also Citizen Weather Observer Program (CWOP) Climatological observers link NOAA Hurricane Hunters 53d Weather Reconnaissance Squadron References External links National Weather Service Coop program Meteorological data and networks