Active weather will keep moving Sunday across the Northern U.S. as a low pressure system skirts across the U.S.-Canadian border. This system brought heavy snowfall to the Pacific Northwest and northern Rockies and will now make its way over the Dakotas and into the Upper Midwest. Expect snowfall accumulation from 3 to 5 inches in these areas. By nightfall, the system will move into the Upper Great Lakes.
Behind this system, a low pressure trough lingers over the Pacific Northwest and is pulling some more moisture onshore. This will bring rain showers along with high-elevation snow showers to the Cascades and the northern Rockies. Snowfall accumulation will be significantly lower than Saturday, with totals from 1 to 2 inches.
South of this system, a cold front will drag through the Great Basin into the central Rockies. The cold front's tail end will extend through California, bringing cooler temperatures to most of the West.
In the South, a low pressure system over the Gulf of Mexico continues pushing moisture over the surrounding coasts. Expect widespread scattered showers and thunderstorms from the Mississippi River Valley through Florida. The rest of the Eastern seaboard will remain under a large ridge of high pressure, allowing for dry, sunny and pleasant conditions.
Temperatures in the lower 48 states ranged Saturday from a morning low of -14 degrees at Hallock, Minn., to a high of 86 degrees at Kendall, Fla.
Weather Underground: http://www.wunderground.com
National Weather Service: http://iwin.nws.noaa.gov