Barometric Pressure Forecast for Courtice, Canada
Barometric pressure forecast for Courtice, Ontario — on the north shore of Lake Ontario in Clarington, east of Oshawa. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Courtice
Courtice sits on the gently sloping ground between the Lake Ontario shoreline and the Oak Ridges Moraine a few kilometres north, in the eastern part of the Greater Toronto Area. The lake dominates the local climate through most of the year. In late autumn, before the water cools, cold air crossing it from the northwest generates snow squalls that come ashore in narrow intense bands, and Durham Region often takes these while Toronto stays clear. In spring the same water works in reverse, holding the shoreline cool and cloudy well into May with a lake breeze that pushes inland on sunny afternoons. The larger pressure events come from Colorado lows tracking northeast into the Great Lakes, which deepen as they arrive and can bring rain, ice and snow within a single system, and from Alberta clippers moving through quickly behind them. December through February is the most active period on the barometer.
What this means for you
Great Lakes systems often change precipitation type mid-event, which means a long unsettled pressure profile rather than one clean drop. Logging in a migraine tracker app through a Colorado low will show how drawn out these can be.