A good reason! If I am feeling desperate I look at the national weather (synoptic) map for what might be coming several days out. It shows what is coming across the USA. What it brings here is up for grabs that far out, still it can help with guessing at the timing. These are in all the state quadrant forums on the site, this one is for the SE:
http://fksa.org/showthread.php?t=6734