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Scoutmasters may think that the most reliable predictor of foul weather is their Troop’s camping schedule; as soon as the cars are loaded on a Friday night the sky darkens and the wind picks up.
Access to the finest weather observing and forecasting technology is now available all over the web. My choice is The Weather Underground a rich collection of useful information presented in a simple, clear manner;
Daily forecasts and Radar Maps
Looking at an animated radar map is, for me at least, more helpful than reading a forecast alone.
Trip Planner
Especially helpful when planning several months away from the date or far from home. Past weather conditions are analyzed to create a prediction of precipitation and temperature for any given date.
Astronomy Charts
A simple sky chart that shows the locations of the constellations, stars and planets for a given location and time.
I recommend http://footsforecast.blogspot.com I feel his forecasts are over the top, so at least you know the worst possible and improbable forecast.