Weather Underground Forecast for Wednesday, March 26, 2014
A cold frontal boundary will advance eastward over the western third of the country on Wednesday, while a low pressure system will skim across the Northeast.
A cold front is expected to push eastward over the West Coast and the Intermountain West on Wednesday. Light to moderate rain will be possible from Washington to central California, while moderate to heavy snow showers will push across the Cascades, the Sierra Nevadas and the Rockies. The heaviest snow associated with this system will occur along western facing slopes across the Sierra Nevadas. Snow accumulations in the Sierra Nevadas are forecast to range between 12 to 18 inches above 7,000 feet, while snow accumulations at 5,500 to 6,500 feet will range between 3 to 8 inches.
Meanwhile, several waves of low pressure will move across the central portion of the country on Wednesday. A warm, humid flow from the Gulf of Mexico will trigger showers and thunderstorms across the central and southern Plains, the Mississippi Valley and parts of the central Gulf Coast. Temperatures will remain below normal across the northern Plains and the upper Midwest, as a mixture of heavy rain and snow move eastward from the Dakotas to the central Great Lakes.
To the east, a low pressure system will drift north northeastward along the northern Mid-Atlantic and New England coasts. Heavy snow showers will be possible along coastal New England, while scattered snow showers will linger across eastern New York and several New England states. The remainder of the Eastern Seaboard will stay clear of precipitation due to high pressure over the Southeast.
Temperatures in the Lower 48 states Tuesday have ranged from a morning low of -18 degrees at Presque Isle, Maine to a high of 86 degrees at Kendall, Fla.