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Timothy P. Marchok

Research Meteorologist


Contact Information:

email timothy.marchok at

phone 609-452-6534

Timothy P. Marchok

Research Interests

  • Prediction of tropical cyclogenesis on time scales of up to two weeks
  • Prediction of tropical cyclone track, intensity and surface wind structure


  • 2017 NOAA Certificate of Achievement: In recognition of contributions to the development of the GFDL hurricane model, the model’s successful transition to NWS operations, and the continual support resulting in steady improvements over its lifetime.
  • 2006 U.S. Dept of Commerce Gold Medal:  For timely improvements to the GFDL hurricane model that led to outstanding track and intensity forecasts for Hurricanes Katrina and Rita.
  • 2005 U.S. Dept of Commerce Bronze Medal:  For improvements to operational hurricane track forecasts through improvements to the GFDL hurricane model and transition of these to the National Weather Service and U.S. Navy.

Some recent papers

  • Marchok, Timothy, 2021: Important factors in the tracking of tropical cyclones in operational models. Journal of Applied Meteorology and Climatology, 60(9), DOI: .
  • Sampson, C R., E M Fukada, J A Knaff, B R Strahl, M J Brennan, and Timothy Marchok, June 2017: Tropical cyclone gale wind radii estimates for the western North Pacific. Weather and Forecasting, 32(3), DOI:10.1175/WAF-D-16-0196.1 .
  • Bender, M.A., T.P. Marchok, C.R. Sampson, J. Knaff, and M.J. Morin, 2017:  Impact of storm size on prediction of storm track and intensity using the 2016 operational GFDL hurricane modelWeather and Forecasting, in press.