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 model (HWRF) for North Atlantic tropical cyclones. Bulletin of the American Meteorological Society, 105(6):E932-E961, 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 model (HWRF) for North Atlantic tropical cyclones. Bulletin of the American Meteorological Society, 105(6):E932-E961, 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
- Poyer, A., W. Komaromi, S. Gopalakrishnan, L. Wolf, F. Marks, G. Alaka Jr., J. Anderson, V. Tallapragada, M. Brennan, A. Mehra, X. Zhang, Z. Zhang, A. Hazelton, D.A. Zelinsky, J.L. Franklin, A. Aksoy, C. Alexander, M. Bender, L. Bernardet, M. Biswas, J. Cangialosi, M. DeMaria, R. Dunlap, M. Ek, G. Eosco, L. Gramer, L. Harris, J.S. Hilderbrand, E. Kalina, H.-S. Kim, P. Kucera, B. Liu, P. McCaslin, T. Marchok, J. Moskaitis, K. Musgrave, L. Nance, K. Newman, M. Onderlinde, W. Ramstrom, D. Rosen, J. Sims, J. Sippel, D. Stern, R. Torn, X. Wang, W. Wang, Y. Weng, B.C. Zachry, C. Zhang, M. Zhang, and L. Zhu. 2021-2022 HFIP R&D activities summary: Recent results and operational implementation. HFIP Technical Report, HFIP-2023-1, 73 pp., https://doi.org/10.25923/exgj-1n68 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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