For around R-Town, I've found Accuweather.com is generally better than Weather.com. The local TV stations are usually better still, but they don't have the hour-by-hour stuff.

True story: I was once on a ride with Joe Lundberg of Accuweather.com, (he rides a Specialized Secteur). The skies were dark and everyone was milling around wondering whether to ride or not.

After taking the usual crap about his order for sunshine being back-ordered, Joe borrowed someone's phone, found weather radar, and said, "We've got about 90 minutes. Let's ride." We rode 45 minutes out, turned around, and rode 45 minutes back.

As we were putting the bikes on the cars, it started to rain.