What is a clear sky called? Cloudless skies mean no rain, no haze, and no fog. In the daytime, a cloudless sky is blue and bright, and a cloudless night sky is perfect for stargazing through a telescope. This adjective is formed by adding the suffix -less, “lacking,” to cloud. Definitions of cloudless.
How accurate is Clear sky chart? Based on a numerical weather model, Clear Sky Charts are perhaps the most accurate and the most usable forecasters of astronomical observing conditions for over 6300 observatories and observing sites in North America.
How do you read a clear sky chart? The colors are picked from what color the sky is likely to be, with Dark blue being clear. Lighter shades of blue are increasing cloudiness and white is overcast. This forecast may miss low cloud and afternoon thunderstorms. When the forecast is clear, the sky may still be hazy, if the transparency forecast is poor.
Which place has the most clear sky? There is an easy way to get above all that air – go to the Atacama Desert in northern Chile. Here, in one of the driest, highest and clearest skies in the world is the small town of San Pedro de Atacama.