Environment Canada Ontario Weather - Long and short-term weather forecasts for Ontario, includes synopsis, Convective (Severe) Weather Warnings, current forecasts and regional reports. - http://weather.ec.gc.ca/forecast/textforecast_e.html#ON
The Ontario Weather Page - Weather forecasts, watches/warnings, radar and satellite images, real time lightning display and road conditions, among other resources. - http://www.ontarioweather.com