Editorial Type:
Article
Article Type:
Research Article

Targeted Observations to Improve Operational Tropical Cyclone Track Forecast Guidance

Sim D. Aberson Hurricane Research Division, NOAA/AOML, Miami, Florida

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Print Publication:
01 Aug 2003
DOI:
https://doi.org/10.1175//2550.1
Page(s):
1613–1628
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Abstract

Since 1997, the Tropical Prediction Center and the Hurricane Research Division have conducted operational synoptic surveillance missions with a Gulfstream IV-SP jet aircraft to improve numerical forecast guidance. Due to limited aircraft resources, optimal observing strategies for these missions must be developed. In the current study, the most rapidly growing modes are represented by areas of large forecast spread in the NCEP bred-vector ensemble forecasting system. The sampling strategy requires sampling of the entire target region with regularly spaced dropwindsonde observations.

Three dynamical models were employed in testing the targeting and sampling strategies. With the assimilation into the numerical guidance of all the observations gathered during the surveillance missions, only the 12-h Geophysical Fluid Dynamics Laboratory Hurricane Model forecast showed statistically significant improvement. Assimilation of only the subset of data from the subjectively found fully sampled target regions produced a statistically significant reduction of the track forecast errors of up to 25% within the critical first 2 days of the forecast. This is comparable with the cumulative business-as-usual improvement expected over 18 yr.

Corresponding author address: Dr. Sim D. Aberson, Hurricane Research Division, NOAA/AOML, 4301 Rickenbacker Cswy., Miami, FL 33149. Email: sim.aberson@noaa.gov

Abstract

Since 1997, the Tropical Prediction Center and the Hurricane Research Division have conducted operational synoptic surveillance missions with a Gulfstream IV-SP jet aircraft to improve numerical forecast guidance. Due to limited aircraft resources, optimal observing strategies for these missions must be developed. In the current study, the most rapidly growing modes are represented by areas of large forecast spread in the NCEP bred-vector ensemble forecasting system. The sampling strategy requires sampling of the entire target region with regularly spaced dropwindsonde observations.

Three dynamical models were employed in testing the targeting and sampling strategies. With the assimilation into the numerical guidance of all the observations gathered during the surveillance missions, only the 12-h Geophysical Fluid Dynamics Laboratory Hurricane Model forecast showed statistically significant improvement. Assimilation of only the subset of data from the subjectively found fully sampled target regions produced a statistically significant reduction of the track forecast errors of up to 25% within the critical first 2 days of the forecast. This is comparable with the cumulative business-as-usual improvement expected over 18 yr.

Corresponding author address: Dr. Sim D. Aberson, Hurricane Research Division, NOAA/AOML, 4301 Rickenbacker Cswy., Miami, FL 33149. Email: sim.aberson@noaa.gov

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  • Aberson, S. D., 1998: Five-day tropical cyclone track forecasts in the North Atlantic basin. Wea. Forecasting, 13 , 1005–1015.

  • Aberson, S. D., 2001: The ensemble of tropical cyclone track forecasting models in the North Atlantic basin (1976–2000). Bull. Amer. Meteor. Soc., 82 , 1895–1904.

    • Search Google Scholar
    • Export Citation

  • Aberson, S. D., 2002: Two years of operational hurricane synoptic surveillance. Wea. Forecasting, 17 , 1101–1110.

  • Aberson, S. D., and M. DeMaria, 1994: Verification of a nested barotropic hurricane track forecast model (VICBAR). Mon. Wea. Rev., 122 , 2804–2815.

    • Search Google Scholar
    • Export Citation

  • 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.

    • Search Google Scholar
    • Export Citation

  • Aberson, S. D., S. J. Majumdar, and C. H. Bishop, 2001: A realtime ensemble for the prediction of hurricane tracks in the Atlantic basin. Preprints, 18th Conf. on Weather Analysis and Forecasting and 14th Conf. on Numerical Weather Prediction, Fort Lauderdale, FL, Amer. Meteor. Soc., 456–457.

    • Search Google Scholar
    • Export Citation

  • Appenzaler, C., H. C. Davies, J. M. Popovic, S. Nickovic, and M. B. Gavrilov, 1996: PV morphology of a frontal-wave development. Meteor. Atmos. Phys., 58 , 21–40.

    • Search Google Scholar
    • Export Citation

  • Bergot, T., G. Hello, A. Joly, and S. Malardel, 1999: Adaptive observations: A feasibility study. Mon. Wea. Rev., 127 , 743–765.

  • Bishop, C. H., and Z. Toth, 1999: Ensemble transformation and adaptive observations. J. Atmos. Sci., 56 , 1748–1765.

  • Bishop, C. H., B. J. Etherton, and S. J. Majumdar, 2001: Adaptive sampling with the ensemble transform Kalman filter. Part I: Theoretical aspects. Mon. Wea. Rev., 129 , 420–436.

    • Search Google Scholar
    • Export Citation

  • Bowie, E. H., 1922: Formation and movement of West Indian hurricanes. Mon. Wea. Rev., 50 , 173–190.

  • Bristor, C. L., 1958: Effect of data coverage on the accuracy of 500-mb forecasts. Mon. Wea. Rev., 86 , 299–308.

  • Buizza, R., and A. Montani, 1999: Targeting observations using singular vectors. J. Atmos. Sci., 56 , 2965–2985.

  • 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.

    • Search Google Scholar
    • Export Citation

  • 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.

    • Search Google Scholar
    • Export Citation

  • Chan, J. C. L., and W. M. Gray, 1982: Tropical cyclone movement and surrounding flow relationships. Mon. Wea. Rev., 110 , 1354–1374.

  • Dong, K., and C. J. Neumann, 1986: The relationship between tropical cyclone motion and environmental geostrophic flows. Mon. Wea. Rev., 114 , 115–122.

    • Search Google Scholar
    • Export Citation

  • Eliassen, A., 1953: On the demands upon the aerological network from the viewpoint of numerical forecasting. Geophysica, 4 , 144.

  • Franklin, J. L., and M. DeMaria, 1992: The impact of Omega dropwindsonde observations on barotropic hurricane track forecasts. Mon. Wea. Rev., 120 , 381–391.

    • Search Google Scholar
    • Export Citation

  • Garriott, E. B., 1895: Tropical storms of the Gulf of Mexico and the Atlantic Ocean in September. Mon. Wea. Rev., 23 , 167–169.

  • Gregg, W. R., 1920: Aerological observations in the West Indies. Mon. Wea. Rev., 48 , 264.

  • Henderson, J. M., G. M. Lackmann, and J. R. Gyakum, 1999: An analysis of Hurricane Opal's forecast track errors using quasigeostrophic potential vorticity inversion. Mon. Wea. Rev., 127 , 292–307.

    • Search Google Scholar
    • Export Citation

  • Hock, T. F., and J. L. Franklin, 1999: The NCAR GPS dropwindsonde. Bull. Amer. Meteor. Soc., 80 , 407–420.

  • House, D. C., 1960: Remarks on the optimal spacing of upper-air observations. Mon. Wea. Rev., 88 , 97–100.

  • Jordan, E. S., 1952: An observational study of the upper wind-circulation around tropical storms. J. Meteor., 9 , 340–346.

  • 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.

    • Search Google Scholar
    • Export Citation

  • Langland, R. H., and G. D. Rohaly, 1996: Adjoint-based targeting of observations for FASTEX cyclones. Preprints, Seventh Conf. on Mesoscale Processes, Reading, United Kingdom, Amer. Meteor. Soc., 369–371.

    • Search Google Scholar
    • Export Citation

  • Larsen, R. J., and M. L. Marx, 1981: An Introduction to Mathematical Statistics and Its Applications. Prentice-Hall, 530 pp.

  • Liu, Q., T. Marchok, H-L. Pan, M. Bender, and S. J. Lord, 2000: Improvements in hurricane initialization and forecasting at NCEP with global and regional (GFDL) models. NOAA Technical Procedures Bulletin 472, 7 pp. [Available online at http://www.nws.noaa.gov/om/tpb/472.htm.].

    • Search Google Scholar
    • Export Citation

  • 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.

    • Search Google Scholar
    • Export Citation

  • Lorenz, E. N., and K. A. Emanuel, 1998: Optimal sites for supplementary weather observations: Simulation with a small model. J. Atmos. Sci., 55 , 399–414.

    • Search Google Scholar
    • Export Citation

  • Miller, B. I., and P. L. Moore, 1960: A comparison of hurricane steering levels. Bull. Amer. Meteor. Soc., 41 , 59–63.

  • Namias, J., and P. F. Clapp, 1951: Observational studies of general circulation patterns. Compendium of Meteorology, Amer. Meteor. Soc., 551–567.

    • Search Google Scholar
    • Export Citation

  • Palmer, T. N., R. Gelaro, J. Barkmeijer, and R. Buizza, 1998: Singular vectors, metrics, and adaptive observations. J. Atmos. Sci., 55 , 633–653.

    • Search Google Scholar
    • Export Citation

  • Parrish, D. F., and J. C. Derber, 1992: The National Meteorological Center's spectral statistical-interpolation analysis system. Mon. Wea. Rev., 120 , 1747–1763.

    • Search Google Scholar
    • Export Citation

  • Pike, A. C., 1985: Geopotential heights and thicknesses as predictors of Atlantic tropical cyclone motion and intensity. Mon. Wea. Rev., 113 , 931–939.

    • Search Google Scholar
    • Export Citation

  • Pu, Z-X., and E. Kalnay, 1999: Targeting observations with the quasi-linear inverse and adjoin and adjoint NCEP global models: Performance during FASTEX. Quart. J. Roy. Meteor. Soc., 125 , 3329–3338.

    • Search Google Scholar
    • Export Citation

  • Pu, Z-X., E. Kalnay, J. Sela, and I. Szunyogh, 1997: Sensitivity of forecast errors to initial conditions with a quasi-inverse linear model. Mon. Wea. Rev., 125 , 2479–2503.

    • Search Google Scholar
    • Export Citation

  • Riehl, H., and R. J. Shafer, 1944: The recurvature of tropical storms. J. Meteor., 1 , 42–54.

  • Riehl, H., W. H. Haggard, and R. W. Sanborn, 1956: On the prediction of 24-hour hurricane motion. J. Meteor., 13 , 415–420.

  • Shapiro, L. J., 1996: The motion of Hurricane Gloria: A potential vorticity diagnosis. Mon. Wea. Rev., 124 , 2497–2508.

  • Shapiro, L. J., and J. L. Franklin, 1999: Potential vorticity asymmetries and tropical cyclone motion. Mon. Wea. Rev., 127 , 124–131.

  • Simpson, R. H., 1971: The decision process in hurricane forecasting. NOAA Tech. Memo. NWS SR-53, 30 pp.

  • 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.

    • Search Google Scholar
    • Export Citation

  • Szunyogh, I., Z. Toth, R. E. Morss, S. J. Majumdar, B. J. Etherton, and C. H. Bishop, 2000: The effect of targeted dropsonde observations during the 1999 winter storms reconnaissance program. Mon. Wea. Rev., 128 , 3520–3537.

    • Search Google Scholar
    • Export Citation

  • Toth, Z., and E. Kalnay, 1993: Ensemble forecasting at NMC: The generation of perturbations. Bull. Amer. Meteor. Soc., 74 , 2317–2330.

  • Tuleya, R. E., and S. J. Lord, 1997: The impact of dropwindsonde data on GFDL hurricane model forecasts using global analyses. Wea. Forecasting, 12 , 307–323.

    • Search Google Scholar
    • Export Citation

  • U.S. Weather Bureau, 1892: Some observations of the wind direction at different altitudes around West India cyclones. Mon. Wea. Rev., 20 , 50–51.

    • Search Google Scholar
    • Export Citation

  • Velden, C. S., and L. M. Leslie, 1991: The basic relationship between tropical cyclone intensity and the depth of the environmental steering layer in the Australian region. Wea. Forecasting, 6 , 244–253.

    • Search Google Scholar
    • Export Citation

  • Viñes, B., 1898: Investigation of the cyclonic circulation and the translatory movement of West Indian hurricanes. Rep. W. B. 168, U.S. Dept. of Agriculture Weather Bureau, 34 pp.

    • Search Google Scholar
    • Export Citation

  • Woollen, J. R., 1991: New NMC operational OI quality control. Preprints, Ninth Conf. on Numerical Weather Prediction, Denver, CO, Amer. Meteor. Soc., 24–27.

    • Search Google Scholar
    • Export Citation
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