A mixture of rain and snow accompanied a low pressure system from the Great Lakes to New England during early January. An upper-level low and its associated surface low tracked across the central and eastern U.S. from January 11 to 13. More than 4 inches of snow blanketed areas from Kansas east to the middle Mississippi Valley, Ohio Valley, and mid-Atlantic. Snowfall reports of up to 20 inches were reported from northern Missouri, while 8 to 13 inches of snow occurred in the Washington, D.C. metro area. Periods of onshore flow continued to affect the West Coast although precipitation generally averaged below normal across the Pacific Northwest during the past week. A vigorous upper-level low approached southern California on January 14, bringing heavy snow (6 to 12 inches) to elevations above 5,000 feet and locally heavy rain (more than 1 inch) from the Los Angeles area south to San Diego.