Two features in the country will be responsible for producing rain and snow.
First, a stationary front will be draped from east TX to off the Carolinas coast early today and will slowly move north until it gets to the Ohio River and Mid-Atlantic by Sunday evening then will begin retreating southward as a cold front. This front will be the focal point for rain showers and a few storms as well. Heavy rain is expected with some of this activity producing widespread accumulations of over an inch from southeast OK/northeast TX east-northeastward to southern New England and a few isolated severe storms are possible from the Arklatex east to western AL. Widespread rain amounts of 3 or more inches are possible from northern MS northeast to the southern Virginias. Precipitation will build northward through the Mid-Atlantic and New England and even east into the Great Lakes tonight and Saturday with a few inches of snow possible in the higher elevations mostly from the Virginias northward with the highest totals coming in ME.
The other feature will be a trough in the western part of the country which will produce a few disturbances tracking from the Northwest into the Plains and Midwest producing mainly light precipitation though widespread snow accumulations are likely in the mountainous regions in the northwest and a few inches possible in parts of the central and northern Plains and Upper Midwest.