For North American stargazing fans, the Clear Sky Chart offers a helpful series of charts that provide up-to-date forecasts of over 1,400 observatories in the United States, Canada, Mexico, and the Bahamas. These charts are based on data released by the Canadian Meteorological Center (CMC) and a model originally designed by CMC meteorologist Allan Rahill. The site is currently maintained by software guru and self-described "amateuar astronomer" Atilla Danko. To access these charts, visitors are invited to browse by region or search by position by entering latitude/ longitude information. Each chart includes information about cloud cover, transparency, wind, and humidity. The chart is color-coded to reveal the time of day best for viewing the sky at each observatory. In addition, when visitors explore these observatories by region, they can also view information about light pollution at each observatory.