U.S. wheat futures dropped to their lowest level in more than six weeks and their second straight day of declines as weather forecasts bolstered expectations for strong yields adding to already high supplies in the coming weeks. Good rains expected to build across much of the winter wheat belt over the next 10 days. CBOT May soft red winter wheat settled down 3-3/4 cents. Weather for U.S. winter crop is expected to improve and there is more downside for wheat prices.