Contact David Sills, PhD:

Phone & Address



National Lab for Nowcasting and Remote Sensing Meteorology (Toronto, ON)

Adjunct Professor, Department of Earth and Space Science Engineering, York University, Toronto, Ontario

Member, Canadian Meteorological and Oceanographic Society and American Meteorological Society


Geoff Howell Citation of Excellence for Innovation, 2016

Ph.D. Atmospheric Science, York University, 1998

Cerificate in Meteorology, York University, 1993

B.Sc. Atmospheric Science, York University, 1993


David Sills, PhD

Severe Weather Scientist - Investigating hazardous summer weather and techniques for forecasting/nowcasting

CURRENT S&T / RESEARCH - Contributing to Environment Canada’s mandate to protect the lives and property of Canadians against severe and extreme weather

  • Low-level convergence boundaries (lake-breeze fronts, thunderstorm gust fronts, drylines) and their relationship to severe weather (heavy rain, hail, damaging wind and tornadoes) and hazardous levels of air pollutants (ozone and particulate matter)
  • Tornadoes and their climatology
  • Total lightning (Southern Ontario Lightning Mapping Array, GOES-R Geostationary Lightning Mapper)
  • Development of advanced prototype tools and techniques for severe weather nowcasting such as the interactive Convective Analysis and Storm Tracking prototype
  • Bridging the gap between meteorological research and operations


Serve as Environment Canada representative on the ASCE EF-Scale Standards Committee

Provide scientific reviews of journal manuscripts (e.g. Journal of Applied Meteorology and Climatology, Weather and Forecasting, Atmosphere-Ocean, Atmospheric Environment, Atmospheric Research, Boundary-Layer Meteorology, Journal of Wind Engineering and Industrial Aerodynamics, Hydrological Processes, Journal of Climatology, Alternatives)

Transfer of science knowledge to operational meteorologists through dynamic presentations (e.g., change of season workshops, damage survey training sessions) and real-time interactive learning

Supervise and serve on defence committees for graduate students at York University and University of Manitoba

Organize professional meetings (e.g., 2010 and 2016 Great Lakes Operational Meteorology Workshops, Toronto, ON; 2007 UNSTABLE Science Workshop, Edmonton, AB; 2006 BAQS-Met Science Workshop, Toronto, ON; 2005 3rd MSC Forecasters Forum, Montreal, PQ)


Cheng, V. Y. S., G. B. Arhonditsis, D. M. L. Sills, H. Auld, M. W. Shephard, Wm. A. Gough, and J. Klaassen, 2013: Probability of tornado occurrence across Canada. J. Climate, 26, 9415-9428.

Sills, D. M. L., J. R. Brook, I. Levy, P. A. Makar, J. Zhang, and P. A. Taylor, 2011: Lake breezes in the southern Great Lakes region and their influence during BAQS-Met 2007.
Atmospheric Chemistry and Physics. 11: 7955-7973.

Taylor, N. M., D. M. L. Sills, J. M. Hanesiak, J. A. Milbrandt, C. D. Smith, G. S. Strong, S. H. Skone, P. J. McCarthy, and J. C. Brimelow, 2011: The Understanding Severe Thunderstorms and Alberta Boundary Layers Experiment (UNSTABLE) 2008. Bulletin of the American Meteorological Society. 92: 739-763.

Sills, D. M. L.. 2009: On the MSC Forecasters Forums and the Future Role of the Human Forecaster. Bulletin of the American Meteorological Society. 90: 619-627.

Sills, D., N. Driedger, B. Greaves, E. Hung and R. Paterson. 2009. iCAST: a Prototype Thunderstorm Nowcasting System Focused on Optimization of the Human-Machine Mix. Proceedings, 2nd World Weather Research Programme Symposium on Nowcasting and Very Short Range Forecasting, Whistler, British Columbia, Environment Canada. DVD-ROM Paper 2.9.

Sills, D. M. L., and N. M. Taylor, 2008: The Research Support Desk (RSD) initiative at Environment Canada: Linking severe weather researchers and forecasters in a real-time operational setting. Preprints, 24th AMS Conference on Severe Local Storms, Savannah, GA, American Meteorological Society. Paper 9A.1.

Sills, D.M.L., J.W. Wilson, P.I. Joe, D.W. Burgess, R.M. Webb and N.I. Fox. 2004. The 3 November tornadic event during Sydney 2000: storm evolution and the role of low-level boundaries. Weather and Forecasting. 19:22-42.

King, P. W. S., M. Leduc, D. M. L. Sills, N. R. Donaldson, D. R. Hudak, P. I. Joe, B. P. Murphy, 2003: Lake breezes in Southern Ontario and their relation to tornado climatology. Weather and Forecasting. 18:795-807.

Hastie, D.R., J. Narayan, C. Schiller, H. Niki, P.B. Shepson, D.M.L. Sills, P.A. Taylor, W.J. Moroz, J.W. Drummond, N. Reid, R. Taylor, P.B. Roussel and O.T. Melo. 1999. Observational evidence for the impact of lake breeze circulation on ozone concentrations in southern Ontario. Atmospheric Environment. 33:323-335.

Expertise Categories associated with this S&T Expert:

     Air Pollution & Quality
          Atmospheric transport
     Climate Change and Processes
          Severe weather
Weather & Meteorology
     Cloud physics
          Remote sensing
          Satellite technology
     Severe Weather
          Risk assessment
Date modified: