UNU-INWEH Another Drop Seminar Series
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Another Drop January 2019

The United Nations University Institute for Water, Environment and Health (UNU-INWEH) is pleased to invite you to its next free, public lecture! 

Flash Flood Events, Their Prediction, and the Future

Flash flooding events occur when large amounts of accumulating rainfall exceed the capacity, natural or otherwise, for surface water to be removed. Highly urbanized areas, given their lack of permeable surfaces and constrained drainage, are often most at risk from flash flooding events. Prediction of such events is challenging, particularly when small-scale weather features have an oversized impact - causing thunderstorms to generate copious amounts of accumulating rainfall even when large-scale conditions seem marginally conducive at best. There are also indications that flash flooding events are on the increase across Canada due to anthropogenic climate change.

This lecture will focus on the details of one particular event – the 2013 ‘billion dollar’ flash flood in Toronto – to illustrate the characteristics of a modern, urban flash flooding event and the challenges for weather forecasting. The future of flash flood prediction given new and emerging knowledge and technologies will also be discussed.

WHEN: Tuesday January 22, 2019

6:45pm (Refreshments)
7:00pm (Lecture)

McMaster Innovation Park
Conference Room 1AB
175 Longwood Road South
Hamilton, ON. L8P 0A1

ADMISSION COST: Absolutely free!


Please note that seating is limited. 

To register  spot, RSVP online here or 
email us at

Guest Speaker
Dr. David Sills has been a Severe Weather Scientist at Environment and Climate Change Canada for 20 years. During that time, the main focus of his research has been on the influence of mesoscale weather features on the location, timing and intensity of thunderstorms and related severe weather such as flash floods, tornadoes, hail and damaging winds. In 2016 he was awarded the CMOS Rube Hornstein Medal for his contributions to operational meteorology in Canada. In his spare time, he is a singer/songwriter, photographer and Great Lakes sailor.
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Copyright © 2019 United Nations University Institute for Water, Environment and Health (UNU-INWEH), All rights reserved.

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United Nations University Institute for Water, Environment and Health (UNU-INWEH)
175 Longwood Road South
McMaster Innovation Park, Suite 204
Hamilton, ON L8P 0A1

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UNU-INWEH is supported by the Government of Canada.