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Weather Underground Forecast for Saturday, July 04, 2015
A stationary front will extend from the southern Plains to the Mid-Atlantic on Saturday, while monsoonal thunderstorms will fire up across the western states.
A stationary front will stretch across the southern Plains, the lower Mississippi Valley, the Tennessee Valley and the Mid-Atlantic. Multiple waves of low pressure will develop along this frontal boundary, which will produce showers and thunderstorms across the eastern half of the country. The most defined area of low pressure will slide east northeastward over the northern Mid-Atlantic, fueling rain and thunderstorms over the eastern Ohio Valley, the northern Mid-Atlantic and southern New England. Showers and thunderstorms will also develop across the Southeast, the Deep South and the southern Plains. Weather conditions will remain cool and dry across the upper Midwest on Saturday.
Meanwhile, daytime heating and monsoonal moisture will aid in the development of showers and thunderstorms over the Intermountain West, the Desert Southwest and the Great Basin. The most likely areas that will experience thunderstorms will be along favorable terrain across the Sierra Nevada and the Rockies. High pressure will continue to bring warm, dry conditions to the Northwest. The exception to this will be across the northern tier of the country. A developing cold front will bring a bit of a cool down to northern Washington, northern Idaho and northern Montana on Saturday. .