Reuters: Tropical Storm Matthew strengthened over the western Caribbean on Friday and was expected to hit Nicaragua and Honduras later in the day, the U.S. National Hurricane Center said. The storm, which had maximum sustained winds of 50 mph, could disrupt the coffee harvest due to begin early next month in major regional exporters Honduras and Guatemala. Nicaragua has already slashed its estimate for the 2010/2011 season after months of heavy rains battered crops and …