surface visibility उदाहरण वाक्य

The technical threshold for a blizzard requires surface visibility to be a quarter-mile or less due to snow or blowing snow along with temperatures below 20 degrees Fahrenheit and sustained winds of more than 35 mph for three consecutive hours.
When a low stratiform cloud contacts the ground, it is called fog if the prevailing surface visibility is less than 1 kilometer, although radiation and advection types of fog tend to form in clear air rather than from stratus layers.