Hugh E. Willoughby, director of the Hurricane Research Division, generously provided the HRD flight-level data archive. Appreciation is also extended to James L. Franklin of the Tropical Prediction Center for sharing his calculations of flight-level reduction factors. Bret Whissel contributed invaluable computer programming expertise, for which we are deeply grateful. Very constructive reviews came from Dr. Chris Landsea and another anonymous reviewer. This work was partially supported by Contract 1338- 847-41 from Florida International University.
Franklin, J. L., , M. L. Black, , and K. Valde, 2000: Eyewall wind profiles in hurricanes determined by GPS dropwindsondes. Preprints, 24th Conf. on Hurricanes and Tropical Meteorology, Ft. Lauderdale, FL, Amer. Meteor. Soc., 446–447.
Franklin, J. L., , M. L. Black, , and K. Valde, 2003: GPS dropwindsonde wind profiles in hurricanes and their operational implications. Wea. Forecasting, 18 , 32–44.
George, J. E., , and W. M. Gray, 1976: Tropical cyclone motion and surrounding parameter relationships. J. Appl. Meteor, 15 , 1252–1264.
Gray, W. M., , and D. J. Shea, 1976: Data summary of NOAA's hurricane inner-core radial leg flight penetrations 1957–1967, 1969. Atmospheric Science Paper 257, Colorado State University, 221 pp.
Holland, G. J., 1995: Mature structure and structure change. Global Perspectives of Tropical Cyclones, R. Elsberry, Ed., World Meteorological Organization, 13–52.
Jarvinen, B. R., , C. J. Neumann, , and M. A. S. Davis, 1984: A tropical cyclone data tape for the North Atlantic Basin, 1886–1983: Contents, limitations, and uses. NOAA Tech. Memo. NWS NHC 22, Coral Gables, FL, 21 pp.
Jordan, C. L., 1958: Estimation of surface central pressure in tropical cyclones from aircraft observations. Bull. Amer. Meteor. Soc, 39 , 345–352.
Jorgensen, D. P., 1984: Mesoscale and convective-scale characteristics of mature hurricanes. Part I: General observations by research aircraft. J. Atmos. Sci, 41 , 1268–1285.
Marks Jr., F. D., , R. A. Houze, , and J. F. Gamache, 1992: Dual-aircraft investigation of the inner core of Hurricane Norbert. Part I: Kinematic structure. J. Atmos. Sci, 49 , 919–942.
Powell, M. D., 1987: Changes in the low-level kinematic and thermodynamic structure of Hurricane Alicia (1983) at landfall. Mon. Wea. Rev, 115 , 75–99.
Powell, M. D., , P. P. Dodge, , and M. L. Black, 1991: The landfall of Hurricane Hugo in the Carolinas: Surface wind distribution. Wea. Forecasting, 6 , 379–399.
Powell, M. D., , S. H. Houston, , and T. Reinhold, 1996: Hurricane Andrew's landfall in south Florida. Part I: Standardizing measurements for documentation of surface wind fields. Wea. Forecasting, 11 , 304–328.
Samsury, C. E., , and E. J. Zipser, 1995: Secondary wind maxima in hurricanes: Airflow and relationship to rainbands. Mon. Wea. Rev, 123 , 3502–3517.
Schwerdt, R. W., , F. P. Ho, , and R. R. Watkins, 1979: Meteorological criteria for standard project hurricane and probable maximum hurricane windfields, Gulf and East coasts of the United States. NOAA Tech. Rep. NWS 23, 317 pp.
Shea, D. J., , and W. M. Gray, 1973: The hurricane's inner core region. I: Symmetric and asymmetric structure. J. Atmos. Sci, 30 , 1544–1564.
Weatherford, C. L., , and W. M. Gray, 1988a: Typhoon structure as revealed by aircraft reconnaissance. Part I: Data analysis and climatology. Mon. Wea. Rev, 116 , 1032–1043.
Weatherford, C. L., , and W. M. Gray, 1988b: Typhoon structure as revealed by aircraft reconnaissance. Part II: Structural variability. Mon. Wea. Rev, 116 , 1044–1056.
Willoughby, H. E., , and M. B. Chelmow, 1982: Objective determination of hurricane tracks from aircraft observations. Mon. Wea. Rev, 110 , 1298–1305.