The nation's weather

For The Associated PressJuly 9, 2014 

Weather Underground Forecast for Thursday, July 10, 2014

A cold front will extend from the southern Plains to the Northeast on Thursday, while monsoonal moisture will move across the Desert Southwest.

A cold front will extend across the southern Plains, the lower Mississippi Valley, the Southeast and the Eastern Seaboard. As warm, humid air streams northward from the Gulf of Mexico, rain and thunderstorms will develop across the Mid-Atlantic, the Southeast, the Gulf Coast, the Deep South and the lower Mississippi Valley. In addition, an area of low pressure will deepen over the central Plains, which will bring scattered showers and thunderstorms to the northern and central Plains, as well as the middle and upper Mississippi Valley. An area of high pressure will build to the north of this frontal boundary, focusing over the Great Lakes. This will bring cool, dry conditions to the Ohio Valley, the upper Midwest and the Northeast.

Meanwhile, monsoonal moisture will continue to surge across the Desert Southwest, the Great Basin and the Intermountain West. This moisture will aid in producing isolated thunderstorms across the region. These thunderstorms will bring a threat of flash flooding to valleys adjacent to sloped terrain. The majority of the West Coast will stay mostly clear of precipitation due to a ridge of high pressure over the eastern Pacific.

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Temperatures in the Lower 48 states Wednesday have ranged from a morning low of 39 degrees at Leadville, Colo. to a high of 100 degrees at Quincy Muni, Quincy, FL, Fla.

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