A stormy weather pattern will impact areas from the southern Plains to the Mid-Atlantic on Monday, while dry conditions prevail over the West Coast.
A wave of low pressure will transition east northeastward from the central Plains to the Ohio Valley. A warm frontal boundary will extend east northeastward ahead of this system, generating moderate to heavy rain and strong thunderstorms across the middle Mississippi Valley, the Midwest, the Tennessee Valley and the Mid-Atlantic. Severe thunderstorms will be possible in southeast Illinois, Kentucky, southern Indiana, southern Ohio and West Virginia. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain will bring threats of flash flooding to the southern Ohio Valley, the central Appalachians and the northern Mid-Atlantic. A cold frontal boundary stretching southwestward will also ignite strong to severe thunderstorms across the lower Mississippi Valley and the southern Plains. Severe thunderstorms will be possible in northern Texas and southwest Oklahoma.
Just to the north, a low pressure system will move eastward across the northern Plains and south central Canada. This system will produce light to moderate rain and embedded thunderstorms over portions of the northern Plains and the upper Midwest. In the wake of this system, a Pacific cold front will initiate scattered showers and thunderstorms across the upper Intermountain West and the northern high Plains.
Monsoonal thunderstorms will persist over parts of the central and southern Rockies. High pressure should keep the majority of the Southwest, the Great Basin and the Pacific Northwest mostly clear of wet weather.
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