Posted May 18, 2018 10:44 p.m. EDT
Tropical moisture will extend from the Caribbean Sea to the Great Lakes and Northeast on Saturday. A flow around high pressure over the Atlantic, a storm over the eastern Great Lakes and a weak subtropical feature will combine forces to produce the wet weather. While rain will wet New England, downpours are likely to drench and cause localized flooding from upstate New York to the coastal Middle Atlantic and Florida Peninsula. The flooding will be mainly associated with urban and poor drainage areas. Showers and thunderstorms are likely to be more spotty from the Ohio Valley to the southern Appalachians and rest of the Southeast. Much of the Northeast will be free of rain Sunday, while showers and storms reload over the Midwest and Southeast states.
Farther west, much of the lower Mississippi Valley to central Texas is likely to be free of rain with some sunshine. However, a second large swath of wet weather is forecast from the northern Rockies to the central Plains and the Upper Midwest. Storms from the central Plains to the southern High Plains may be severe later in the day. Storms are also forecast to erupt over the Sierra Nevada during the afternoon. Much of the balance of the West and part of the northern Plains can expect dry weather.
FOCUS: River Flooding In Washington, D.C.
Rain across the Mid-Atlantic states this week has caused river flooding over parts of Virginia, including our nation’s capital. The Potomac and the Rappahannock have flooded their banks and will remain flooded through the weekend.