Dr. Jason A. Sippel
Meteorologist
Hurricane Research Division
phone: 305-361-4368
jason.sippel@noaa.gov
NOAA's Atlantic Oceanographic and Meteorological Laboratory
4301 Rickenbacker Causeway
Miami, FL 33149
Recently Published Peer-Reviewed Papers- Alaka, G.J. Jr., J.A. Sippel, Z. Zhang, H.-S Kim, F. Marks, V. Tallapragada, A. Mehra, X. Zhang, A. Poyer, and S.G. Gopalakrishnan. Lifetime performance of the operational Hurricane Weather Research and Forecasting (HWRF) model for North Atlantic tropical cyclones. Bulletin of the American Meteorological Society, https://doi.org/10.1175/BAMS-D-23-0139.1 2024
- Sippel, J.A., S.D. Ditchek, K. Ryan, and C.W. Landsea. The G-IV inner circumnavigation: A story of successful organic interactions between research and operations at NOAA. Bulletin of the American Meteorological Society, 105(1):E218-E232, https://doi.org/10.1175/BAMS-D-23-0084.1 2024
- Ditchek, S.D., and J.A. Sippel. A comparison of the impacts of inner-core, over-vortex, and environmental dropsondes on tropical cyclone forecasts during the 2017-2020 hurricane seasons. Weather and Forecasting, 38(11):2169-2187, https://doi.org/10.1175/WAF-D-23-0055.1 2023
- Alaka, G.J. Jr., J.A. Sippel, Z. Zhang, H.-S Kim, F. Marks, V. Tallapragada, A. Mehra, X. Zhang, A. Poyer, and S.G. Gopalakrishnan. Lifetime performance of the operational Hurricane Weather Research and Forecasting (HWRF) model for North Atlantic tropical cyclones. Bulletin of the American Meteorological Society, https://doi.org/10.1175/BAMS-D-23-0139.1 2024
- Sippel, J.A., S.D. Ditchek, K. Ryan, and C.W. Landsea. The G-IV inner circumnavigation: A story of successful organic interactions between research and operations at NOAA. Bulletin of the American Meteorological Society, 105(1):E218-E232, https://doi.org/10.1175/BAMS-D-23-0084.1 2024
- Ditchek, S.D., and J.A. Sippel. A comparison of the impacts of inner-core, over-vortex, and environmental dropsondes on tropical cyclone forecasts during the 2017-2020 hurricane seasons. Weather and Forecasting, 38(11):2169-2187, https://doi.org/10.1175/WAF-D-23-0055.1 2023
- Ditchek, S.D., J.A. Sippel, G.J. Alaka Jr., S.B. Goldenberg, And L. Cucurull. A systematic assessment of the overall dropsonde impact during the 2017-2020 hurricane seasons using the basin-scale HWRF. Weather and Forecasting, 38(6):789-816, https://doi.org/10.1175/WAF-D-22-0102.1 2023
- Ditchek, S.D., J.A. Sippel, P.J. Marinescu, and G.J. Alaka, Jr. Improving best-track verification of tropical cyclones: A new metric to identify forecast consistency. Weather and Forecasting, 38(6):817-831, https://doi.org/10.1175/WAF-D-22-0168.1 2023
- Holbach, H.M., O. Bousquet, L. Bucci, P. Chang, J. Cione, S. Ditchek, J. Doyle, J.-P. Duvel, J. Elston, G. Goni, K.K. Hon, K. Ito, Z. Jelenak, X. Lei, R. Lumpkin, C.R. McMahon, C. Reason, E. Sanabia, L.K. Shay, J.A. Sippel, A. Sushko, J. Tang, K. Tsuboki, H. Yamada, J. Zawislak, and J.A. Zhang. Recent advancements in aircraft and in situ observations of tropical cyclones. Tropical Cyclone Research and Review, 12(2):81-99, https://doi.org/10.1016/j.tcrr.2023.06.001 2023
- Sellwood, K.J., J.A. Sippel, and A. Aksoy. Assimilation of Coyote small uncrewed aircraft system observations in Hurricane Maria (2017) using operational HWRF. Weather and Forecasting, 38(6):901-919, https://doi.org/10.1175/WAF-D-22-0214.1 2023
- Christophersen, H., J.A. Sippel, A. Aksoy, and N.L. Baker. Recent advances for tropical cyclone data assimilation. Annals of the New York Academy of Sciences, 1517(1):25-43, https://doi.org/10.1111/nyas.14873 2022
- Sippel, J.A., X. Wu, S.D. Ditchek, V. Tallapragada, and D. Kleist. Impacts of assimilating additional reconnaissance data on operational GFS tropical cyclone forecasts. Weather and Forecasting, 37(9):1615-2796, https://doi.org/10.1175/WAF-D-22-0058.1 2022
- Zawislak, J., R.F. Rogers, S.D. Aberson, G.J. Alaka, G. Alvey, A. Aksoy, L. Bucci, J. Cione, N. Dorst, J. Dunion, M. Fischer, J. Gamache, S. Gopalakrishnan, A. Hazelton, H.M. Holbach, J. Kaplan, H. Leighton, F. Marks, S.T. Murillo, P. Reasor, K. Ryan, K. Sellwood, J.A. Sippel, and J.A. Zhang. Accomplishments of NOAA’S airborne hurricane field program and a broader future approach to forecast improvement. Bulletin of the American Meteorological Society, 103(2):E311-E338, https://doi.org/10.1175/BAMS-D-20-0174.1 2022
- Gopalakrishnan, S., D. Koch, S. Upadhayay, M. DeMaria, F. MARKS, E.N. Rappaport, A. Mehra, V. Tallapragada, Y. Jung, G. Alaka, C. Alexander, M. Bender, L. Bernardet, M. Biswas, T. Black, M. Brennan, J. Cangialosi, J. Dong, R. Dunlap, M. Ek, J.L. Franklin, L. Gramer, G. Hallliwell, L. Harris, A. Hazelton, J.S. Hilderbrand, E. Kalina, H.S. Kim, P. Kucera, N. Lett, B. Liu, T. Marchok, P. McCaslin, K. Musgrave, L. Nance, K. Newman, M. Onderlinde, A. Penny, W. Ramstrom, J. Sippel, R. Torn, X. Wang, W. Wang, J. Whitaker, H. Winterbottom, D.A. Zelinsky, F. Zhang, C. Zhang, X. Zhang, Z. Zhang, and L. Zhu. 2019 Hurricane Forecast Improvement Project R&D activities summary: Recent results and operational implementation. HFIP Technical Report, HFIP2020-1, 45 pp., https://doi.org/10.25923/qzd3-m787 2020
- Li, J., J. Li, C. Velden, P. Wang, T.J. Schmit, and J. Sippel. Impact of rapid‐scan‐based dynamical information from GOES‐16 on HWRF hurricane forecasts. Journal of Geophysical Research-Atmospheres, 125(3):e2019JD031647, https://doi.org/10.1029/2019JD031647 2020
- Wick, G.A., J.P. Dunion, P.G. Black, J.R. Walker, R.D. Torn, A.C. Kren, A. Aksoy, H. Christophersen, L. Cucurull, B. Dahl, J.M. English, K. Friedman, T.R. Peevey, K. Sellwood, J.A. Sippel, V. Tallapragada, J. Taylor, H. Wang, R.E. Hood, and P. Hall. NOAA’s Sensing Hazards with Operational Unmanned Technology (SHOUT) Experiment: Observations and forecast impacts. Bulletin of the American Meteorological Society, 101(7):E698-E987, https://doi.org/10.1175/BAMS-D-18-0257.1 2020
- Munsell, E.B., F. Zhang, S.A. Braun, J.A. Sippel, and A.C. Didlake. The inner-core temperature structure of Hurricane Edouard (2014): Observations and ensemble variability. Monthly Weather Review, 146(1):135-155, https://doi.org/10.1175/MWR-D-17-0095.1 2018
- Nystrom, R.G., F. Zhang, E.B. Munsell, S.A. Braun, J.A. Sippel, Y. Weng, and K. Emanuel. Predictability and dynamics of Hurricane Joaquin (2015) explored through convection-permitting ensemble sensitivity experiments. Journal of the Atmospheric Sciences, 75(2):401-424, https://doi.org/10.1175/JAS-D-17-0137.1 2018
- Tong, M., J.A. Sippel, V. Tallapragada, E. Liu, C. Kieu, I.-H. Kwon, W. Wang, Q. Liu, Y. Ling, and B. Zhang. Impact of assimilating aircraft reconnaissance observations on tropical cyclone initialization and prediction using operational HWRF and GSI ensemble-variational hybrid data assimilation. Monthly Weather Review, 146(12):4155-4177, https://doi.org/10.1175/MWR-D-17-0380.1 2018
- Wang, W., J.A. Sippel, S. Abarca, L. Zhu, B. Liu, Z. Zhang, A. Mehra, and V. Tallapragada. Improving NCEP HWRF simulations of surface wind and inflow angle in the eye area. Weather and Forecasting, 33(3):887-898, https://doi.org/10.1175/WAF-D-17-0115.1 2018
- Zhang, J.A., F.D. Marks, J.A. Sippel, R.F. Rogers, X. Zhang, S.G. Gopalakrishnan, Z. Zhang, and V. Tallapragada. Evaluating the impact of improvement in the horizontal diffusion parameterization on hurricane prediction in the operational Hurricane Weather Research and Forecasting (HWRF) model. Weather and Forecasting, 33(1):317-329, https://doi.org/10.1175/WAF-D-17-0097.1 2018
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