I'm always on the lookout for cool new Firefox extensions, so I was pretty happy to find that there is a Clear Sky Clock Plugin available from the Louisville Astronomical Society. For those of you unfamiliar with the Clear Sky Clock, it is basically a weather forecast made especially for astronomers that includes such parameters as cloud cover, seeing, and transparency. The forecast is rendered in bars that span the next two days, with blue squares meaning desireable weather patterns. Unfortunately, mine's almost always white (The forecast in the picture to the right is not mine)! Find your Clear Sky Clock forecast.
The Firefox extension is available from the Louisville Astronomical Society for free. Follow their instructions and give it a try!
Also, my fellow blogger David Gamey put together some scripts and other useful information on the Clear Sky Clock. You can use his scripts on your own website, and they include information like the forecast, satellite passes, and a map of the location!