There is no doubt that we are in a full-fledged weather market just now, one that developed rapidly enough to catch noncommercial shorts. When July corn pushed through long-time resistance at $3.80, it seemed to trigger massive fund buying. General Comments Overnight trading of grain and soy futures was brisk. The volume of corn traded overnight was nearly three times as much as during Tuesday. Markets continued to respond to unfavorable weather forecasts, effectively building a larger weather premium into prices. Somewhat surprisingly, the changes in open interest after yesterday’s rally suggest that there was less short covering than thought.Heavy trade carried over into the day session as traders responded to forecasts of upcoming very...