Heavy rain will continue across the East Coast on Monday, while an active weather pattern sets up over the Plains.
Tropical Depression Bonnie is forecast to drift northeastward across the Mid-Atlantic. This system will usher moderate to heavy rain and embedded thunderstorms over a large part of the Eastern Seaboard. Flash flooding will be possible across a handful of states, including eastern South Carolina, eastern North Carolina, eastern Virginia, eastern Maryland, Delaware, New Jersey, southeast New York, Connecticut, Rhode Island and southeast Massachusetts. By the afternoon and evening, a cold frontal boundary will sweep across the Mid-Atlantic and the Northeast. This frontal boundary will interact with Tropical Depression Bonnie, causing the system to weaken.
Meanwhile, a low pressure system will push east southeastward over the northern Plains. A cold frontal boundary associated with this system will ignite strong to severe thunderstorms across the Plains and the Mississippi Valley. Severe thunderstorms will be possible in South Dakota, Nebraska, northeast Colorado and northwest Kansas. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain will bring chances of flash flooding to North Dakota, South Dakota, southwest Minnesota, northwest Iowa, central Texas and southwest Oklahoma.
Most areas west of the Continental Divide will experience dry weather on Monday. Temperatures will spike into the triple digits across a large span of the Desert Southwest.
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