50th Anniversary of Operational Numerical Weather Prediction Harper, Kristine ; Uccellini, Louis W. ; Kalnay, Eugenia ; Carey, Kenneth ; Morone, Lauren Abstract Publication: Bulletin of the American Meteorological Society Pub Date: 2007 DOI: 10.1175/BAMS-88-5-639 Bibcode: 2007BAMS...88..639H