On Monday morning fog rolled up from the rivers around Calgary and covered most of the city and surrounding areas. I was near the Springbank airport at sunrise and the visibility was not much more than a hundred metres. I photographed the sunrise from a hill above the fog and then returned to the airport. This photograph was taken about 20 minutes after daybreak as the line of fog was receding towards Calgary. I was surprised by the speed that it moved and even more so when it returned again a few minutes later. This ebb and flow reminded me of the tides and was amazing to be in the middle of. I will share more soon but wanted to start with this first view of the sun when the fog was rolling eastward.