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Chasers Dave Demko and Nathan Bain intercepted an intense band of powerplant-effect snow near Lake Overholser west of Oklahoma City on January 31!
Industrial snow is basically a nocturnal phenomenon. Fall out occurs most frequently in the hours before and around sunrise (Figure 2) after low stratus/fog has formed during the night. If low winter stratus does
not dissipate during the day industrial snow may already fall a few hours after sunset (Figure 3).
Snow depth is typically 1 to 2 mm and not evenly distributed in the affected area. In Winterthur a local snow depth of 20 mm has been observed. As extreme values local snow depths of 50, 100, and 150 mm
have been reported for the motorway near Kriegstetten on a distance of about 1000 m requiring mechanical removal of the snow.