Thunderstorms will affect a handful of states across the Plains and the Mississippi Valley on Wednesday, while a ridge of high pressure builds over the East Coast.
A slow moving low pressure system will transition east northeast across the central Plains and the upper Mississippi Valley. A stationary front extending southward will be the focal point of rain and thunderstorms, stretching from the central and southern Plains to the Ohio Valley and the central Gulf Coast. Due to the slow nature of this frontal system, flash flooding will be possible in eastern Texas, northern Louisiana, southeast Oklahoma, Arkansas, northwest Mississippi, southeast Missouri, western Tennessee, western Kentucky, southwest Indiana and southern Illinois. In addition, a mixture of rain and high elevation snow will linger across the central Rockies.
Most areas west of the Continental Divide will remain under a dry weather pattern. Temperatures will be 10 to 25 degrees above normal from the Pacific Northwest to the Desert Southwest. The exception to this dry weather will be across western Washington, western Oregon and northwest California, as scattered showers and isolated thunderstorms will be possible.
Dry conditions will also prevail from New England to the Southeast due to a ridge of high pressure over the Mid-Atlantic.
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