Lyndsay Morrison, staff writer
August 10, 2010 — Fog reduced visibility Tuesday morning from Windsor, Ontario to Moncton, New Brunswick. Chris St. Clair explains fog and why it works the way it does.
Many people in eastern Canada woke up to a thick, soupy airmass on Tuesday morning. The fog was so dense in some areas, that visibility was reduced to zero.
At one point, the fog stretched from Windsor, Ontario, to Moncton, New Brunswick. Ottawa was one of the most affected areas.
“Fog is simply a cloud near the surface of the earth,” explains Chris St. Clair, a weather presenter here at The Weather Network. “Radiation fog occurs when the warm, saturated ground begins to release its moisture to the air. With the absence of the clouds, the air is cooler. There's nothing to insulate or hold in the heat. Therefore, there's no lift patterns and the moisture begin to cool and fog is formed.”
For more on the fog conditions in your area, be sure to check our Canadian Cities Index.