After trading slightly higher overnight, soybean futures prices gave way to a milder weather outlook and less than overwhelming weekly export sales data. The soybean market’s decline was one part of a broad down day for most commodity markets. General Comments As has happened frequently this summer, the main weather models are having trouble portraying weather conditions a week in advance, much less agreeing on what they will be. Conflicting readings from model run to model run and day to day have frustrated traders. Yesterday the soybean market posted double-digit gains, largely because the models called for a return of intense heat and limited rain across the Corn Belt beginning next week and possibly lasting for 10 days or more. That w...