If you live in North America and have a PC running Windows Vista, you can have Attilla Danko's Clear Sky Clock (CSC) on your desktop 24 hours a day. The ClearSkyClock Gadget is a free tool that displays a color-coded hourly forecast of cloud cover and transparency for up to three observing sites. The display is refreshed every 30 minutes, though the forecast itself is updated only X times each day. One click takes you to the CSC website (cleardarksky.com/csk ), where you can get help interpreting the display (S&T: April 2003, page 62). Undocking the gadget increases the display width and level of detail.
ClearSkyClock Vista Gadget can be downloaded at
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