Weather Underground Forecast for Tuesday, April 22, 2014
A cold frontal boundary will extend from the southern Plains to the eastern Great Lakes on Tuesday, while a separate cold front will move across the western third of the country.
A cold front will stretch from central Texas to the eastern Great Lakes on Tuesday. As this system propagates eastward, it will interact with a warm muggy air mass to produce rain and thunderstorms over a handful of states. Stormy weather is expected across the Gulf Coast, the lower Mississippi Valley, the Southeast, the Tennessee Valley, the Ohio Valley, the Mid-Atlantic and the Northeast. Cooler temperatures will linger over northern New England, which will bring a chance of mixed precipitation to the region. High pressure will keep most of the southern Plains, the Mississippi Valley and the upper Midwest clear of wet weather on Tuesday.
Meanwhile, a separate cold front will move across the West Coast, the Great Basin and the Intermountain West on Tuesday. During the first half of the day, this system is expected to usher rain across Washington, Oregon and northern California, while the Cascades are forecast to receive 6 to 10 inches of snow. By the afternoon, wet weather will move over the Great Basin and the Intermountain West, bringing moderate to heavy snow showers to the northern Rockies. Scattered thunderstorms will also be possible over the central and northern Plains. The southern California and Arizona deserts will stay mostly clear on Tuesday, as temperatures are forecast to range between the 80s and 90s.
Temperatures in the Lower 48 states Monday have ranged from a morning low of 19 degrees at Yellowstone, Wyo. to a high of 90 degrees at Needles, Calif.