The new WeatherSpark application takes weather forecasting and display to a whole new geek level. Forget cute fluffy cloud icons and stodgy 4 day forecasts, this puppy comes with dynamic drag and drop mega charting with cloud cover and rain, comparisons across different decades (brilliant to see what the weather should be for this time of year) and a Google Map mashup which is designed to make it trivially easy to find out the weather in your area.

Trust me, weather information doesn’t come much better than this. Oh and there are icons if you *really* want them. Brilliant!