A significant number of the measurable rainfall reports came from the east coast of Florida. Lake-effect snow produced some half-inch precipitation amounts and 4 to 8 inches of snow in northern Michigan. Snow also fell throughout much of Maine.
|24-hour snowfall map for 7:00 a.m.local time January 20.|
High pressure over much of the lower 48 states and a dry Arctic air mass pushing south is the reason why much of the country was precipitation-free.
|Surface weather map for 9:00 p.m. CST January 20.|