As explained in the section/web page on my permanent observatory, I named it the Blue Hills Observatory because   it is in a subdivision called Blue Hills. Clear Sky Charts exist and are used by professional and amateur   astronomers to judge whether a planned observing event will have acceptable skies. There are Clear Sky Charts   for many observatories and areas in the U.S. The charts are the creation of an individual named Attilla Danko  I   had Mr.Danko create a chart for my observatory. I just learned that he died last month. This might not bode well for   the continued existence and validity of the chart. Someone has taken over Mr. Danko's responsibilities but  that   individual still has a lot ot learn. Also, the chart has forecasts for the time period in the chart. These forecasts are   automated, but over time the methodology of the forecasts may need to be revised. At this time there is no one that   can do this, and there may never be.   As long as the chart is available, click on the Blue Hills Observatory Clear Sky Chart for an update of the forecasts    for Cloud Cover, Transparency, Seeing, Darkness, Smoke, Wind, Humidity, and Temperature in the Blue Hills   Observatory area.

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