Heavy rain has interrupted corn and soybean harvest activity across portions of the Midwest, but forecasters say a drier weather pattern should soon allow farmers to return to fields. Remnants of Hurricane Polo contributed to heavy rainfall from Kansas and Nebraska through Missouri, Iowa and Illinois. Flood warnings and advisories remained in effect Friday in several areas, according to the National Weather Service. Farther east, rainfall is slowing fieldwork in Indiana and Ohio. Agriculture.com reports nearly 40% of Ohio fields already had surplus soil moisture as harvest began, leaving some areas vulnerable to additional delays. Indiana averaged only one day suitable for fieldwork during the previous week, while Ohio recorded 2.6 days, according to USDA data cited by Agriculture.com. Conditions are expected to improve. National Weather Service meteorologist Brad Pugh said a drier pattern should become established across most of the Corn Belt by October 5. The October 5-11 outlook favors below-normal precipitation in Indiana and Ohio.