The risk of severe weather will shift to parts of the Northeast and Ohio Valley Tuesday afternoon into Tuesday night.
Cities including Buffalo and Rochester, New York; Pittsburgh; Cleveland; Cincinnati; Charleston and Morgantown, West Virginia; Louisville and Lexington, Kentucky; Evansville, Indiana; Dyersburg, Tennessee; and Cape Girardeau, Missouri, could experience travel disruptions, sporadic power outages, flooded streets and property damage from the storms.
The storms will bring frequent lightning strikes, blinding rain and strong gusty winds. Some neighborhoods will be hit with one or more severe weather phenomena including damaging wind gusts, flash flooding and hail.
A couple of the strongest storms could produce a short-lived tornado.
Elsewhere, storms will ignite over parts of Virginia, the Carolinas, Georgia and Florida. Some of the storms over the Florida Peninsula will be driven by the fringe effects of a tropical system destined to become Arthur. The slow-moving storms over the Southeastern states will bring the potential for flash flooding and localized strong wind gusts.
Storms will also fire over parts of northwestern Texas, eastern New Mexico, Oklahoma and Arkansas. In addition to needed rainfall in much of this area, some of the storms will bring the risk of flash flooding and strong wind gusts.
The storms from the St. Lawrence Valley to the southern High Plains are firing along an advancing cool front.
The forward speed of the front and its associated thunderstorms will slow and stall for a time upon approach of the coastal areas of the Northeast Wednesday and Thursday.
While the intensity of the storms will not be as severe, there can be incidents of localized flooding downpours. To make matters more complex on the Atlantic coast, the approach of Arthur may enhance rainfall along the frontal zone, before pulling in dry air from the west later on the Fourth of July into Saturday.
The temperature contrast along the front, combined with strong winds in the middle and upper atmosphere helped to fuel ferocious storms from the central Plains to the Midwest on Monday.
Two complexes of severe thunderstorms on Monday were responsible for hundreds of severe weather incidents from central Iowa to southeastern Michigan, western Ohio and southwestern Ontario. The number of preliminary severe weather reports from Monday topped 500.
Winds aloft are not as strong along the frontal zone Tuesday.