[kebman]

I prefer the weather radar for that. Actual clouds and the live direction they're going in is a great predictor of rain. In fact I'd love to improve lightning detection by making a script that also takes into account wind direction, since lightning tends to travel with clouds. It could be as easy as using an ellipsis directed as a kind of weather vane, perhaps stretching out with wind speed. Currently I use a simple circular distance calculation to detect proximity.