The author thanks NCEP/EMC for help in running the models and in providing the computer resources to make this study possible. Tim Marchok and Morris Bender of NOAA/GFDL ran many of the GFDL cases and provided many helpful comments, and Kao-San Yeh and Xuejin Zhang for helpful comments on an earlier version of the manuscript. Other fruitful discussions were held with Sharan Majumdar and Brian Etherton. Bob Kohler and Bill Barry provided computer support at HRD. The author also thanks the NOAA/Aircraft Operations Center (AOC) flight crews, AOC G-IV project manager Jack Parrish, and HRD personnel who participated in the flights, in addition to Air Force C-130 crews that also provided surveillance data over the years. Two anonymous reviewers improved the presentation of the material.
Aberson, S. D. , 2003: Targeted observations to improve operational tropical cyclone track forecast guidance. Mon. Wea. Rev., 131 , 1613–1628.
Aberson, S. D. , 2008: Large forecast degradations due to synoptic surveillance during the 2004 and 2005 hurricane seasons. Mon. Wea. Rev., 136 , 3138–3150.
Aberson, S. D. , and M. DeMaria , 1994: Verification of a nested barotropic hurricane track forecast model (VICBAR). Mon. Wea. Rev., 122 , 2804–2815.
Aberson, S. D. , and J. L. Franklin , 1999: Impact on hurricane track and intensity forecasts of GPS dropwindsonde observations from the first-season flights of the NOAA Gulfstream-IV jet aircraft. Bull. Amer. Meteor. Soc., 80 , 421–427.
Aberson, S. D. , and B. J. Etherton , 2006: Targeting and data assimilation studies during Hurricane Humberto (2001). J. Atmos. Sci., 63 , 175–186.
Aberson, S. D. , M. L. Black , R. A. Black , R. W. Burpee , J. J. Cione , C. W. Landsea , and F. D. Marks Jr. , 2006: Thirty years of tropical cyclone research with the NOAA P-3 aircraft. Bull. Amer. Meteor. Soc., 87 , 1039–1055.
Bender, M. A. , I. Ginis , R. Tuleya , B. Thomas , and T. Marchok , 2007: The operational GFDL coupled hurricane–ocean prediction system and a summary of its performance. Mon. Wea. Rev., 135 , 3965–3989.
Burpee, R. W. , J. L. Franklin , S. J. Lord , R. E. Tuleya , and S. D. Aberson , 1996: The impact of Omega dropwindsondes on operational hurricane track forecast models. Bull. Amer. Meteor. Soc., 77 , 925–933.
Caplan, P. , J. Derber , W. Gemmill , S-Y. Hong , H-L. Pan , and D. Parrish , 1997: Changes to the 1995 NCEP operational Medium-Range Forecast model analysis-forecast system. Wea. Forecasting, 12 , 581–594.
DeMaria, M. , and J. Kaplan , 1994: A Statistical Hurricane Intensity Prediction Scheme (SHIPS) for the Atlantic basin. Wea. Forecasting, 9 , 209–220.
Kurihara, Y. , M. A. Bender , R. E. Tuleya , and R. J. Ross , 1995: Improvements in the GFDL hurricane prediction system. Mon. Wea. Rev., 123 , 2791–2801.
Kurihara, Y. , R. E. Tuleya , and M. A. Bender , 1998: The GFDL hurricane prediction system and its performance in the 1995 hurricane season. Mon. Wea. Rev., 126 , 1306–1322.
Liu, Q. , T. Marchok , H-L. Pan , M. Bender , and S. Lord , 2000: Improvements in hurricane initialization and forecasting at NCEP with the global and regional (GFDL) models. EMC Tech. Procedures Bull. 472, 7 pp.
Lord, S. J. , 1991: A bogusing system for vortex circulations in the National Meteorological Center global forecast model. Preprints, 19th Conf. on Hurricanes and Tropical Meteorology, Miami, FL, Amer. Meteor. Soc., 328–330.
Majumdar, S. J. , S. D. Aberson , C. H. Bishop , R. Buizza , M. S. Peng , and C. A. Reynolds , 2006: A comparison of adaptive observing guidance for Atlantic tropical cyclones. Mon. Wea. Rev., 134 , 2354–2372.
Parrish, D. F. , and J. C. Derber , 1992: The National Meteorological Center’s Spectral Statistical-Interpolation analysis system. Mon. Wea. Rev., 120 , 1747–1763.
Qu, X. , and J. Heming , 2002: The impact of dropsonde data on forecasts of Hurricane Debby by the Meteorological Office Unified Model. Adv. Atmos. Sci., 19 , 1029–1044.
Reynolds, C. A. , M. S. Peng , S. J. Majumdar , S. D. Aberson , C. H. Bishop , and R. Buizza , 2007: Interpretation of adaptive observing guidance for Atlantic tropical cyclones. Mon. Wea. Rev., 135 , 4006–4029.
Surgi, N. , H-L. Pan , and S. J. Lord , 1998: Improvement of the NCEP global model over the tropics: An evaluation of model performance during the 1995 hurricane season. Mon. Wea. Rev., 126 , 1287–1305.
Woollen, J. R. , 1991: New NMC operational OI quality control. Preprints, Ninth Conf. on Numerical Weather Prediction, Denver, CO, Amer. Meteor. Soc., 24–27.
Wu, C-C. , and Coauthors , 2005: Dropwindsonde Observations for Typhoon Surveillance near the Taiwan Region (DOTSTAR): An overview. Bull. Amer. Meteor. Soc., 86 , 787–790.
Wu, C-C. , K-H. Chou , P-H. Lin , S. D. Aberson , M. S. Peng , and T. Nakazawa , 2007: The impact of dropwindsonde data on typhoon track forecasts in DOTSTAR. Wea. Forecasting, 22 , 1157–1176.