The applications of space weather information are changing rapidly. New operating procedures at electric power facilities now take geomagnetic activity into account; the next-generation air transportation system could rely heavily on GPS navigation, which is susceptible to ionospheric disturbances; and satellite design, operation, and human space flight all demand accurate specification and prediction of space radiation. Our ability to meet these needs is improving. Our increased knowledge of the underlying physical processes in the solar-terrestrial environment, our improving numerical models, and new targeted data sources are enhancing our ability to specify and predict the important conditions in space.