Curriculum Vitae

Thomas M. Hamill

Self portrait

Address:

NOAA Earth System Research Lab, Physical Sciences Division
R/PSD 1, 325 Broadway
Boulder CO 80305-3328 USA
(303) 497-3060 fax -6949
e-mail: <tom.hamill_at_noaa.gov>

Education:

Ph.D., 1997: Cornell University (meteorology, applied math and statistics minors.  Steve Colucci, advisor.)
M.S., 1987: Pennsylvania State University (meteorology; NWP concentration.  Tom Warner, advisor.)
B.S., 1985: Cornell University (meteorology)

Professional Experience:

2005 - current: Meteorologist, NOAA Earth System Research Lab, Physical Sciences Division, Boulder, CO.
2000 - 2005:
Research Scientist, University of Colorado, CIRES (at the former NOAA/Climate Diagnostics Center), Boulder, CO.
1997 - 2000:
Postdoctoral fellow, National Center for Atmospheric Research, Boulder, CO.
1993 - 1997:
Ph. D. candidate in atmospheric sciences, Cornell University. Studied short-range ensemble forecasting using the Eta model (funded by the National Science Foundation). Minors in statistics and applied mathematics. Steve Colucci, advisor.
1991 - 1993:
Senior Research Associate, Atmospheric and Environmental Research, Inc. , Cambridge, MA. Principal investigator on research projects for cloud nowcasting and use of profiler network data. Also performed research in cloud analysis and doppler radar data assimilation in mesoscale forecast models (using the CSU/RAMS model)
1987 - 1991: United States Air Force. Officer-in-charge, Cloud Analysis Unit, Air Force Global Weather Central (now AFWA), Offutt AFB, NE. Responsible for research and development of improvements to the Air Force's cloud analysis and prediction models.

Refereed Publications:

(68) Swinbank, R., others, and T. M. Hamill, 2014:  The THORPEX Interactive Grand Global Ensemble (TIGGE) and its achievements.  Bull. Amer. Meteor. Soc., submitted.
(67) McGovern, A., others, and T. M. Hamill, 2014:  Solar energy prediction: an international contest to initiate interdisciplinary research on compelling meteorological topics.  Bull. Amer. Meteor. Soc., submitted.
(66) Baxter, M. A., G. M. Lackmann, K. M. Mahoney, T. E. Workoff, and T. M. Hamill, 2014:  Verification of precipitation reforecasts over the Southeast United States. Wea. Forecasting, accepted.
(65) Torn, R., J. S. Whitaker, T. M. Hamill, and G. J. Hakim, 2014:  Diagnosis of the source of GFS medium-range track errors in Hurricane Sandy (2012)Mon. Wea. Rev., conditionally accepted.
(64) Moore, B. J., E. M. Sukovich, R. Cifelli, and T. M. Hamill, 2014: Climatology and environmental characteristics of extreme precipitation events in the southeastern United States.  Mon. Wea. Rev., accepted.
(63) Hamill, T. M., 2014: Performance of operational model precipitation forecast guidance during the 2013 Colorado Front Range floods.  Mon. Wea. Rev., 142, 2609-2618.  Also, appendices A, B, and C.
(62) Wick, G. A., P. J. Neiman, F. M. Ralph, and T. M. Hamill, 2014: Evaluation of the forecasts of water vapor signature of atmospheric rivers in operational weather prediction models.  Wea. Forecasting, in press.
(61) Hamill, T. M., and G. N. Kiladis, 2013:  Skill of the MJO and Northern Hemispheric blocking in GEFS medium-range reforecasts.  Mon. Wea. Rev., 142, 686-885.
(60) Hamill, T. M., F. Yang, C. Cardinali, and S. J. Majumdar, 2012:  Impact of targeted Winter Storms Reconnaissance dropwindsonde data on mid-latitude numerical weather forecasts.  Mon. Wea. Rev., 141, 2058-2065.
(59) Hamill, T. M., G. T. Bates, J. S. Whitaker, D. R. Murray, M. Fiorino, T. J. Galarneau, Jr., Y. Zhu, and W. Lapenta, 2012:  NOAA's second-generation global medium-range ensemble reforecast data set.  Bull Amer. Meteor. Soc., 94, 1553-1565.
(58) Whitaker, J. S., and T. M. Hamill, 2012: Evaluating methods to account for system errors in ensemble data assimilation.  Mon. Wea. Rev., 140, 3078-3089.
(57) Hamill, T. M., 2012: Verification of TIGGE Multi-­model and ECMWF Reforecast-­Calibrated Probabilistic Precipitation Forecasts over the Conterminous US.  Mon. Wea. Rev., 140, 2232-2252. 
(57a) Hamill, T. M., 2012: Online appendix to Verification of TIGGE Multi-­model and ECMWF Reforecast-­Calibrated Probabilistic Precipitation Forecasts over the Conterminous US.  Mon. Wea. Rev.
(56) Hirschberg, P.A., E. Abrams. A. Bleistein, W. Bua, L. Delle Monache, T. W. Dulong, J. E. Gaynor, B. Glahn, T. M. Hamill, J. A. Hansen, D. C. Hilderbrand, R. N. Hoffman, B. H. Morrow, B. Philips, J. Sokich, N. Stuart, 2011:  A weather and climate enterprise strategic implementation plan for generating and communicating forecast uncertainty information.  Bull. Amer. Meteor. Soc., 92, 1651-1666.
(55) Hagedorn, R., Buizza, R., Hamill, T. M., Leutbecher, M., and T. N. Palmer, 2012: Comparing TIGGE multi-model forecasts with reforecast-calibrated ECMWF ensemble forecasts.  Quart J. Royal Meteor Soc., 138, 1814-1827.
(54) Galarneau, T. J., Hamill, T. M., Dole, R. M., and J. Perlwitz, 2012: A Multi-Scale Analysis of the Extreme Weather Events over Western Russia and Northern Pakistan During July 2010Mon. Wea. Rev.140, 1639-1664.  DOI 10.1175/MWR-D-11-00191.1
(53) Hamill, T. M., M. J. Brennan, B. Brown, M. DeMaria, E. N. Rappaport, and Z. Toth, 2012:  NOAA's future ensemble based hurricane products.  Bull Amer. Meteor. Soc., 93, 209-220.   Also: online Appendix A and Appendix B.
(52) Hamill, T. M., J. S. Whitaker, D. T. Kleist, M. Fiorino, and S. J. Benjamin, 2011: Predictions of 2010's tropical cyclones using the GFS and ensemble-based data assimilation methods.  Mon. Wea. Rev., 139, 3243-3247.
(51) Hamill, T. M., and J. S. Whitaker, 2011:  What Constrains Spread Growth in Forecasts Initialized from Ensemble Kalman Filters? Mon. Wea. Rev., 139, 117-131. 
(50) Hamill, T. M., J. S. Whitaker, M. Fiorino, and S. J. Benjamin, 2011:  Global ensemble predictions of 2009's tropical cyclones initialized with an ensemble Kalman filter.  Mon. Wea. Rev., 139, 668-688.
(49) Schaake, J., Pailleux, J., Thielen, J., Arritt, R., Hamill, T., Luo, L. F., Martin, E., McCollor, D., Pappenberger, F., 2010 (April):  Summary of recommendations of the first workshop on Postprocessing and Downscaling Atmospheric Forecasts for Hydrologic Applications held at Meteo-France, Toulouse, France, 15-18 June 2009. Atmospheric Science Letters. 11(2): p. 59-63. DOI: 10.1002/asl.267
(48) Hamill, T. M., J. S. Whitaker, J. L. Anderson, and C. Snyder, 2009:  Comment on "Sigma-point Kalman filter data assimilation methods for strongly nonlinear systems.  J. Atmos. Sci., 66, 3498-3500.
(47) Bougeault, P., Z. Toth, many others, T. M. Hamill, and many others, 2009:  The THORPEX Interactive Grand Global Ensemble (TIGGE).  Bull Amer. Meteor. Soc., 91, 1059-1072.
(46) Wang, X., T. M. Hamill, J. S. Whitaker, C. H. Bishop, 2009: A comparison of the hybrid and EnSRF analysis schemes in the presence of model error due to unresolved scales. Mon. Wea. Rev., 137, 3219-3232.
(45) Whitaker, J. S., T. M. Hamill, X. Wei, Y. Song, and Z. Toth, 2008:  Ensemble data assimilation with the NCEP Global Forecast System.  Mon. Wea. Rev., 136, 463-482.
(44) Wang, X., D. M. Barker, C. Snyder, and T. M. Hamill, 2008:  A hybrid ETKF-3DVAR data assimilation scheme for the WRF model. Part II: real observation experiments.  Mon. Wea. Rev., 136, 5132-5147.
(43) Wang, X., D. M. Barker, C. Snyder, and T. M. Hamill, 2008:  A hybrid ETKF-3DVAR data assimilation scheme for the WRF model. Part I: observing system simulation experiments.  Mon. Wea. Rev., 136, 5116-5131.
(42) Hamill, T. M., R. Hagedorn, and J. S. Whitaker, 2008: Probabilistic forecast calibration using ECMWF and GFS ensemble reforecasts.  Part II: precipitation.  Mon. Wea. Rev., 136, 2620-2632.
(41) Hagedorn, R, T. M. Hamill, and J. S. Whitaker, 2008:  Probabilistic forecast calibration using ECMWF and GFS ensemble reforecasts. Part I: 2-meter temperatureMon. Wea. Rev., 136, 2608-2619.
(40) Hamill, T. M., 2007: Making the AMS carbon neutral: offsetting the impacts of flying to conferences. Bull. Amer. Meteor. Soc., 88, 6-9.
(39) Hamill, T. M., and J. S. Whitaker, 2007: Ensemble calibration of 500 hPa geopotential height and 850 hPa and 2-meter temperatures using reforecasts. Mon. Wea. Rev., 135, 3273-3280.
(38) Schaake, J. C., T. M. Hamill, R. Buizza, and M. Clark, 2007: HEPEX, the Hydrological Ensemble Prediction Experiment. Bull. Amer. Meteor. Soc., 88, 1541-1547.
(37) Hamill, T. M., 2007: Comments on "Calibrated Surface Temperature forecasts from the Canadian ensemble prediction system using Bayesian Model Averaging. Mon. Wea. Rev., 135, 4226-4230.
(36) Wilks, D. S., and T. M. Hamill, 2007: Comparison of ensemble-MOS methods using GFS reforecasts. Mon. Wea. Rev., 135, 2379-2390.
(35) Wang, X., T. M. Hamill, and C. Snyder, 2007: On the theoretical equivalence of differently proposed ensemble/3D-Var hybrid analysis schemes   Mon. Wea. Rev., 135, 222-227.
(34) Wang, X., T. M. Hamill, C. Snyder, and C. H. Bishop, 2006: A Comparison of Hybrid Ensemble Transform Kalman Filter-OI and Ensemble Square-Root filter Analysis Schemes. Mon. Wea. Rev., 135, 1055-1076.
(33) Hamill, T. M., 2006: Ensemble-based atmospheric data assimilation Chapter 6 of Predictability of Weather and Climate, Cambridge Press, 124-156.
(32) Hamill, T. M., and J. Juras, 2006: Measuring forecast skill: is it real skill or is it the varying climatology? Quart. J. Royal Meteor. Soc., 132, 2905-2923.
(31) Hamill, T. M., and J. S. Whitaker, 2006: Probabilistic quantitative precipitation forecasts based on reforecast analogs: theory and application Mon. Wea. Rev., 134, 3209-3229.
(30) Sutton, C. J., T. M. Hamill, and T. T. Warner, 2006: Will Perturbing Soil Moisture Improve Warm-Season Ensemble Forecasts? A Proof of Concept Mon. Wea. Rev., 134, 3174-3189.
(30a) Sutton, C. J., T. M. Hamill, and T. T. Warner, 2006: Appendix to "Will Perturbing Soil Moisture Improve Warm-Season Ensemble Forecasts? A Proof of Concept" Mon. Wea. Rev..
(29) Hamill, T. M., J. S. Whitaker, and S. L. Mullen, 2006: Reforecasts, an important dataset for improving weather predictions. Bull. Amer. Meteor. Soc., 87,33-46.
(28) Hamill, T. M., and J. S. Whitaker, 2005: Accounting for the error due to unresolved scales in ensemble data assimilation: a comparison of different approaches Mon. Wea. Rev., 133, 3132-3147.
(27) Hamill, T. M., R. S. Schneider, H. E. Brooks, G. S. Forbes, H. B. Bluestein, M. Steinberg, D. Melendez, and R. M. Dole, 2005: The May 2003 Extended Tornado Outbreak Bull. Amer. Meteor. Soc., 86, 531-542.
(27a) Hamill, T. M., R. S. Schneider, H. E. Brooks, G. S. Forbes, H. B. Bluestein, M. Steinberg, D. Melendez, and R. M. Dole, 2005: Supplement 1 to The May 2003 Extended Tornado Outbreak Bull. Amer. Meteor. Soc..
(27b) Hamill, T. M., R. S. Schneider, H. E. Brooks, G. S. Forbes, H. B. Bluestein, M. Steinberg, D. Melendez, and R. M. Dole, 2005: Supplement 2 to The May 2003 Extended Tornado Outbreak Bull. Amer. Meteor. Soc..
(26) Hamill, T. M., J. S. Whitaker, and X. Wei, 2004: Ensemble re-forecasting: improving medium-range forecast skill using retrospective forecasts Mon. Wea. Rev., 132, 1434-1447.
(25) Whitaker, J. S., G. P. Compo, X. Wei, and T. M. Hamill, 2003: Reanalysis without radiosondes using ensemble data assimilation. Mon. Wea. Rev. , 132, 1190-1200.
(24) Tippett, M., J. L. Anderson, C. H. Bishop, T. M. Hamill, and J. S. Whitaker, 2003: Ensemble square-root filters. Mon. Wea. Rev., 131,1485-1490.
(23) Hamill, T. M., 2003: Evaluating forecasters' rules of thumb: a study of D(Prog)/Dt Wea. Forecasting, 18, 933-937.
(22) Snyder, C., T. M. Hamill, and S. J. Trier, 2003: Linear evolution of error covariances in a quasigeostrophic model. Mon. Wea. Rev., 131, 189-205.
(21) Hamill, T. M., C. Snyder, and J. S. Whitaker, 2002: Ensemble forecasts and the properties of flow-dependent analysis-error covariance singular vectors. Mon. Wea. Rev., 131, 1741-1758.
(20) Snyder, C., and T. M. Hamill, 2003: Lyapunov stability of a turbulent baroclinic jet in a quasigeostrophic model. J. Atmos. Sci., 60683-688.
(19) Hamill, T. M., C. Snyder, and R. E. Morss, 2002: Analysis-error statistics of a quasigeostrophic model using 3-dimensional variational assimilation. Mon. Wea. Rev., 130, 2777-2790.
(18) Whitaker, J. S., and T. M. Hamill, 2002: Ensemble data assimilation without perturbed observations. Mon. Wea. Rev., 130, 1913-1924.
(17) Hamill, T. M., 2002: Adaptive observations. Published in Encyclopedia of the Atmospheric Sciences, Elsevier Science, Ltd., 2537-2542.
(16) Hamill, T. M., and C. Snyder, 2002: Using improved background error covariances from an ensemble Kalman filter for adaptive observations. Mon. Wea. Rev., 130, 1552-1572.
(15) Hamill, T. M., Whitaker, J. S., and C. Snyder, 2001: Distance-dependent filtering of background error covariance estimates in an ensemble Kalman filter. Mon. Wea. Rev., 129, 2776-2790.
(14) Hamill, T. M., 2001: Interpretation of rank histograms for verifying ensemble forecasts. Mon. Wea. Rev., 129, 550-560.
(13) Hamill, T. M., C. Snyder, D. P. Baumhefner, Z. Toth, and S. L. Mullen, 2000: Ensemble forecasting in the short to medium range: report from a workshop. Bull. Amer. Meteor. Soc., 81, 2653-2664.
(12) Hamill, T. M., and C. Snyder, 2000: A hybrid ensemble Kalman filter / 3D-variational analysis scheme.  Mon. Wea. Rev., 128, 2905-2919. (nominated for NCAR's publication of the year award, 2000)
(11) Hamill, T. M., and A. Church, 2000: Conditional tornado probabilities From RUC-2 forecasts, Wea. Forecasting, 15, 461-475.
(10) Hamill, T. M., C. Snyder, and R. E. Morss, 2000: A comparison of probabilistic forecasts from bred, singular vector, and perturbed observation ensembles. Mon. Wea. Rev., 128, 1835-1851.
(9) Hamill, T. M., 1999: Hypothesis tests for evaluating numerical precipitation forecasts. Wea. Forecasting, 14, 155-167.
(8) Hamill, T. M., 1998: Comments on "Short-Range Ensemble Forecasting of Explosive Australian East-Coast Cyclogenesis" Wea. Forecasting, 13,1205-1207.
(7) Hamill, T. M., and S. J. Colucci, 1998: Evaluation of Eta/RSM Ensemble Probabilistic Precipitation Forecasts. Mon. Wea. Rev., 126, 711-724
(6) Hamill, T. M., 1997: Reliability diagrams for multi-category probability forecasts. Wea. Forecasting., 12, 736-741
(5) Hamill, T. M., and S. J. Colucci, 1997: Verification of Eta/RSM Short-Range Ensemble Forecasts. Mon. Wea. Rev., 125, 1312-1327.
(4) Wilks, D. S., and Hamill, T. M., 1995: Potential economic value of ensemble-based surface weather forecasts. Mon. Wea. Rev., 123, 3565-3575.
(3) Hamill, T. M., and D. S. Wilks, 1994: The difficulty in assessing short-range forecast uncertainty: demonstration with a probability-based contest. Wea. Forecasting, 10, 619-630.
(2) Hamill, T. M., and T. Nehrkorn, 1993: A short-term cloud forecast scheme using cross-correlations. Wea. Forecasting, 8, 401-411.
(1) Hamill, T. M., R. P. d'Entremont, and J. T. Bunting, 1992: A description of the Air Force real-time nephanalysis model. Wea. Forecasting, 7, 288-306.

Professional Service

2014: Ph.D. committee member for Francisco Alvarez, St. Louis University.
2014: Co-convener, WWRP Open Science Conference, Montreal, CA.
2013: Co-organizer of modeling session for American Meteorological Society Summer Community Meeting, Boulder, CO.
2013: Co-convener, 6th WMO International Symposium on Data Assimilation, Camp Springs, MD, Oct 2013.
2012 - current : Co-chair, WMO/THORPEX Data Assimilation and Observing Systems Committee.
2011: Co-convener of poster session for WCRP Open Science Conference, Denver.
2011: Local organizer of 27th Annual WGNE (Working Group for Numerical Experimentation) meeting, Boulder, Colorado.
2011: Organizer, joint WGNE-THORPEX-ECMWF workshop on model uncertainty.
2010: Editor, special collection for Monthly Weather Review on Third THORPEX International Science Symposium
2008-2012: Member, International THORPEX Data Assimilation and Observing Systems Committee
2008-2012: Member, American Meteorological Society Committee for Environmental Responsibility
2008-2012:  Program Manager for NOAA THORPEX.
2008-2014:  Member, World Meteorological Organization's Working Group on Numerical Experimentation (WGNE)
2008: Member, drafting committee for AMS statement on probabilistic forecasting.
2007-2010: Member, American Meteorological Society Ad-Hoc Committee on Uncertainty in Forecasts (co-chair, Working Group III, "Solutions")
2007-2010: Member, NOAA/NWS Forecast Uncertainty Steering Team.
2007-2010: Editor, Monthly Weather Review
2007: Coordinator, AMS Short Course on Ensemble Prediction Methods
2006-2011:  Member, American Meteorological Society Committee on Probability and Statistics
2006-2007: Associate Editor, Weather and Forecasting
2005-2009 : Member, HEPEX International Steering Committee
2005-2008 : Member, International THORPEX TIGGE-GIFS Science Committee
2005 : Coordinator, HEPEX Workshop on Hydrologic Ensemble Prediction.
2003 : Coordinator, Workshop on Ensemble Forecasting
1999 : Coordinator, NCAR Workshop on Ensemble Forecasting
1999 - 2003 : Associate Editor, Monthly Weather Review
1997 - current : Proposal reviewer for National Science Foundation

Awards

2013:  NOAA Bronze Medal (with Jeff Whitaker, for "excellence in research and development of ensemble-based and hybrid data assimilation techniques that improve operational weather forecasts.")
2008:  NOAA Publication of the Year award for 2006 Bulletin of the American Meteorological Society article on reforecasting.
2002 : American Meteorological Society's Editor's Award for Monthly Weather Review.
2001 : Presidential Early-Career Award for Scientists and Engineers
1997 : National Center for Atmospheric Research Advanced Studies Program post-doctoral fellowship

Proposals Awarded

2013: NOAA Sandy Supplemental, parameterization component.  $300,000.
2012: NOAA USWRP, Improving Model Uncertainty Parameterizations in Global Ensemble Predictions.  $200,000.
2010: Department of Energy Advanced Leadership Computing Challenge award of 14.5 million CPU hours to produce a next-generation reforecast.
2004: THORPEX, An Intercomparison of Bred, Perturbed Observation, and Ensemble Transform Kalman Filter Methods for Initializing Ensemble Forecasts (co-PI, Jeff Whitaker). NOAA-B8R2WRP, $210,373
2002: Collaborative Research: ITR/Ensemble-based state estimation for a next-generation weather forecasting model, $220,706.
2002: Incorporating the Uncertainty of Atmosphere-Land Surface Interactions into Ensemble Forecasts. National Science Foundation, $320,000.
2001: Diversifying Ensemble Forecasts with Stochastic Convection (co-PI; Brian Mapes, PI). National Science Foundation. $343,000. 1995: "Short-range ensemble prediction..." $86,003 by National Science Foundation.  Grant funded my dissertation research (submitted under my advisor's name). 1991: "Nowcasting Methods Testing" $144,917 by U.S. Air Force, PRDA PL/LY 91-05  Developed new ways to use satellite and doppler profiler data for nowcasting.

Invited Lectures

National Centers for Environmental Prediction (1995, 1996, 1997, 2000, 2006, 2009, 2011) ; NOAA Techniques Development Lab (1996) ; European Centre for Medium-Range Weather Forecasts (1998) ;  National Weather Service COMET Numerical Weather Prediction Faculty Course (1999) ; National Severe Storms Lab (1999, 2007, 2010) ; University of Oklahoma (1999, 2007, 2010ab) ; University of Arizona (2000) ; University at Albany/State University of New York (2000); NASA/Goddard (2000) ; Canadian Meteorological Centre (2001, 2006, 2010) ; Colorado State University (2001, 2003, 2012, 2013); Cornell University (2001, 2003) ; Massachusetts Institute of Technology (2001); AER, Inc. (2001) ; National Weather Service COMET Climate Variability Course (2002, 2006, 2007) ; NCAR (2000, 2002, 2004, 2005, 2007, 2010); ECMWF Seminar on Predictability (2002); University of Colorado (2002); ECMWF (2004, 2005, 2006, 2007); University of L'Aquila, Italy (2004); UK Met Office (2004, 2007); NOAA/FSL (2004); University of Washington (2004, 2007); NOAA Headquarters (2004); NOAA/MDL (2004); University of Maryland (2004); National Academy of Sciences (2005);  NCAR Terrestrial Hydrometeorology Workshop (2006); NCAR Verification Workshop (2007); IUGG, Perugia, Italy (2007); NCAR COMET Hydrological Forecast Course (2007), Southwest Hydrometeorological Workshop, Tucson (2007); University of Washington Climate Impacts Group (2007); ECMWF Workshop on Ensemble Prediction (2007); NCEP ensemble forecast users workshop (2008);  Mediterranean School of Mesoscale Meteorology, Sardinia, Italy (2008).  ARPA-SIM, Bologna, Italy (2008).  WGNE, Montreal (2008), and Offenbach, Germany (2009).  WMO WWRP/THORPEX Workshop on 4D-VAR and Ensemble Kalman Filter Intercomparisons, Buenos Aires, Argentina (2008).  NOAA Intraseasonal to Interranual Workshop (2009); Royal Meteorological Institute of Belgium (2009); University of Heidelberg (2009), NCAR ASP verification summer colloquium (2010); NUOPC workshop, Boulder, CO (2010); NCAR DTC Ensemble Testbed workshop (2010); Utilities Wind Integration Group, Albany NY (2011); ensemble user workshop, Laurel, MD (2011); ECMWF Model Uncertainty workshop (2011); University of Innsbruck (2011); NOAA Research Council (2012); NOAA Climate Program Office/MAPP (2012); NCEP/EMC/GMB (2012); NCAR ASP Summer Colloquium (2012); NCAR COMET Winter Weather Course (2012, 2013).


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