Weather and Climate: Not what your grandparents knew! – CMOS Webinar

David Phillips, Senior Climatologist, Environment and Climate Change Canada

CMOS Toronto and Ottawa Centre Webinar

Urban floods, ice rains, winter heat waves, interface wildfires, weather bombs, megadroughts – if you think we’ve been cursed and clobbered a lot harder and a lot more often recently, you are not imagining it.

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New Global Weather Enterprise Forum Webinar

Please see register for the following Webinar to be given by Prof. Adrian Gerhard, the President of WMO:
Global Weather Enterprise Forum webinar, 28 October – ‘Unlocking the Benefits of Open Weather Data’.

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Proposed Nomenclature for Fire-induced Vortices

– By Patrick McCarthy and Leanne Cormier –

Extreme fire behaviour can manifest itself in many ways, violent tornado-like vortices being one example. On April 19, 2000, a large out-of-control fire at a major flax straw storage facility in southern Manitoba produced numerous vortices. One vortex emerged out of the inferno, tossing a pickup truck.

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Coping with Extreme Weather: A CMOS Public Virtual Forum/Panel Discussion – October 8, 2020

Marking the 2nd anniversary of the Ottawa/Gatineau Tornadoes

8 October 2020, noon to 2PM EDT

Extreme weather events, including tornadoes, floods, ice storms, hurricanes, droughts and blizzards, are a major risk to life, property and the economy in Canada. The risks are changing as climate changes. The Canadian Meteorological and Oceanographic Society (CMOS) is pleased to announce a free two-hour online forum for the public.

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Meteorological Masterclass Webinar Series

The Royal Meteorological Society has joined with the University of Reading to offer a Meteorological Masterclass Series providing training for professionals working in Meteorology and Climate Science. Leading experts will present the latest science for understanding and predicting storm track behaviour across three timescales: from the synoptic-scale meteorology of storms and blocking, to weather-regimes and their consequences for extended-range forecasting and the impacts of climate change and its simulation.

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A Note on ECCC Radar Snowfall Estimates and Radar Data

Diar Hassan (Wood PLC, Ottawa ON), George Isaac (Weather Impacts Consulting Inc., Barrie ON), Peter Taylor (York University, Toronto ON), Daniel Michelson (Environment and Climate Change Canada – ECCC), and Norman Donaldson (ECCC).

It often snows in Newfoundland but on 17 January 2020, it was a little extreme (Figure 1). METAR reports from St John’s airport, CYYT, indicated 35 cm of snow fell between 1200-1800 UTC and another 19 cm in the next 6 hours. These snowfall depth measurements are consistent with many others in the area.

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Micrometeorological Variables and Atmospheric Dispersion Modeling in Two Climate Regions of Quebec

– By Richard Leduc, Ph.D., AirMet Science Inc., and Jean-François Brière, Ministère de l’Environnement et de la Lutte contre les changements climatiques

The US-EPA (2019a) AERMOD dispersion model is widely used to assess the concentration of contaminants in ambient air as a result of emissions from a source. To this end, AERMOD requires micrometeorological variables characterizing turbulence (u*, w*, L, zic, zim); they are calculated by the AERMET module and obtained using local surface and upper air data (wind, temperature and cloud opacity),

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