Ok, The weather here in MD this week is supposed to be in the Low 90s until Friday and saturday where the temperature drops off to 88 degreees and then on saturday, 84 degrees. How Will this affect the bss fishing, will it make the fishing tough and will it move the bass out of the grass beds? It just seems like with temperature drop of 5 degrees occuring, it will be quite a shock to the bass. What would this air temperature drop do to the water temperature? Is this temperature drop considered a cold front? I have a tournament on the potomac river next saturday and that day there is a chance of isolated thunderstorms, would this make the bass more active. Plus, there calling for 55% humidity the day of the tournament with 5 mph winds ( I know thats not a lot), but since its going to be breezy and there will probably be a little chop on the water and The sun is supposed to be very exposed according to the UV index, which is at "very high" at 9, would that make the bass move tighter into the grass as the day grows longer, but the topwater or spinnerbait bite better at dawn before the Sun gets high in the sky?

Hate to say this, but you just have to put your time in at trying to figure them out, on your particular body of water. For instance, a severe cold front can negatively impact bass behavior. But not necessarily so in a river system, as the water is always moving. And to a lesser extent in reservoirs where they release water from time to time.

Fish whenever you can and take a note pad with you. (I use to use a small tape recorder.) Soon patterns will develop and you will know what the fish are going to do, on a particular body of water, at a given weather event. One thing for sure, there are no iron-clad rules in this game (which is why I love it so!).

Also, The water on the river today was 76 and stained

Shouldn't make one iota of difference. If you are on fish and patient with them, you'll catch them.

Some things you've got to do/findout on your own.

I don't know much about river fishing for bass, but I would not even call that temperature drop a cold front. When fishing lakes for bass a temperature drop like that seems to do nothing to the fishing. In my opinion it shouldn't have much if any affect on the fish.