The National Weather Service has issued a Winter Storm Warning from 6 pm this evening to 2 am Thursday for Chautauqua, Cattaraugus and Southern Erie counties. Heavy snow and blowing snow are expected, with total snow accumulations of 8 to 16 inches. Travel will be very difficult to impossible, including during the morning commute on Wednesday. Tree branches could fall. Winds gusting as high as 45 mph will cause areas of blowing and drifting snow.