More Rain Makes More Grain?

One of the oldest sayings in the grain markets is "rain makes grain and more rain makes more grain." Typically traders do not think too much rain can be a problem. I have read many times that even if lower areas are damaged or even drowned out the other areas will more than make up for it because of the extra moisture. Maybe a year ago when continuous and heavy rains during harvest in Argentina destroyed millions of bushels of beans have caused traders to reconsider their thinking.

Watching the national news and the weather radar over the weekend, the delta and heart of the corn belt have received flooding rains and more is falling. The Weather Channel was talking about this unique powerful spring storm system. But yet I did not expect to see corn, beans or wheat much higher when the overnight session opened this evening. Actually all the grains opened a lot higher. Will they hold and even open higher tomorrow morning at 8:30?