Heavy rain and potentially severe thunderstorms could disrupt fall harvest operations across parts of Kansas and Missouri this week. The National Weather Service issued flood watches extending from central Kansas into western Missouri as a storm system moved across the region Tuesday. Forecasters said portions of northern and eastern Kansas faced a 60% to 90% chance of thunderstorms capable of producing damaging winds, large hail and torrential rainfall. Some storms could generate wind gusts reaching 70 mph and hail measuring 2 inches in diameter. Additional rainfall is expected Wednesday night into Thursday, with portions of east-central Kansas potentially receiving more than 3 inches. The storms could delay corn and soybean harvesting, increase soil moisture and complicate field access for machinery. The threat follows recent wet weather that has already affected harvesting in portions of the Midwest. Farmers are monitoring field conditions and forecasts as they work to complete fall harvest operations.