Widespread rain and higher elevation snow were possible in the West on Wednesday, while a warm front was developing over the Central Plains. Light rain and some snow was falling across the East.
Parts of the central Rockies can expect snow accumulation of up to 2 feet. In the Sierras, 6 to 12 inches of snow was possible.
A developing warm front over the Central Plains could bring scattered showers and thunderstorms to the Plains and the Mississippi Valley.
In New England, the Mid-Atlantic and the eastern Great Lakes, light coastal rain and interior snow was likely.
Parts of the Plains could see temperatures ranging 5 to 10 degrees warmer than Tuesday. Highs of 70s are expected to reach as far north as the Northern Plains and 80s should spread across the Southern Plains. Portions of the Great Basin can expect temperatures to drop several degrees as a Pacific system pushes farther inland.
Temperatures in the Lower 48 states Tuesday ranged from a low of 14 degrees at Mt. Washington, N.H., to a high of 96 degrees at Laredo, Texas.