This past weekend there were some important changes to extended weather models that are worth noting. We are not meteorologists; we do, however, follow several different private and public weather sources in an effort to track yield potential. This is especially important this year because the market is bearish based on a record corn yield estimate as well as a world oilseed situation that has tightened greatly with the small crops in Brazil and Argentina.Summer weather across the U.S. Corn Belt must be nearly perfect to achieve a record corn yield. Spring planted crops were off to a very quick start because the warm and dry spring season facilitated early planting. The month of May was not as kind. Many areas in the U.S. recorded precipi...