While a storm system moving up from the South will be past peak, the system may pack enough punch to bring locally severe thunderstorms and flash flooding part of the Ohio Valley and East Coast into Tuesday night.
**Flash flooding occurred in the Gaithersburg and Germantown, Md. area during the midday Tuesday. Flash flooding expanded to multiple areas north and west of Washington, D.C. and Baltimore during the afternoon. Thunderstorm winds damaged homes in the Anderson, S.C. area during the morning Tuesday.**
According to Severe Weather Expert Henry Margusity, "As an upper-level disturbance associated with the storms system lifts northward the right conditions could develop to produce a few thunderstorms with high wind gusts, hail and even a short-lived tornado."
The violent storm risk area extends from eastern Kentucky to much of West Virginia and central and southern Ohio and southwestern Pennsylvania during Tuesday.
Cities that could be impacted by the storms include Cincinnati, Dayton and Columbus, Ohio; Lexington and London, Ky.; Charleston, Huntington and Morgantown, W.Va.; and Pittsburgh, Pa.
Key to the potential of the storms is how much daytime warming occurs.
"If these areas remain cloudy much of the day, there may not be enough energy and rising air to get severe thunderstorms going," Margusity said. "Provided the storms do develop, atmospheric conditions indicate a fair amount of wind shear, which can lead to damaging wind gusts and perhaps a couple of tornadoes."
Because of cloud-cover issues, an large outbreak of severe weather is not expected, but rather only isolated severe storms.
Some of the storms bringing the severe weather may not have a great deal of lightning strikes associated with them and may sneak up on some locations as a result.
Other thunderstorms will affect the Atlantic Seaboard during Tuesday and a couple of these storms could be heavy and gusty in the I-95 swath from Florida to New York and part of the I-81 corridor farther west.
By heavy and gusty we mean there is not only the potential for damaging wind gusts, but also incidents of flash and urban flooding.
"These areas will be the warmest within the storm system's reach, but the main wind energy will be directed northward toward the upper Ohio Valley, rather than toward the East Coast," Margusity added.
While the storm system is weakening, it will have enough energy and moisture to bring areas of rain into the Northeast into Wednesday.
The chilliest air of the season so far will settle over much of the Northeast Thursday into Friday and will bring frost to more areas than experienced frost early this week.
Tropical moisture from the approaching Odile will deliver another round of heavy rain and flooding downpours to the interior Southwest by the middle of this week.
The remnants of Odile have the potential to bring heavy rain and flooding to parts of the Plains and Midwest late this week after hitting the Southwest.
On Tuesday, Edouard became the first major hurricane in the Atlantic since Sandy. While the hurricane remains at sea, rough surf will reach some Atlantic coast beaches.
A raging wildfire, which erupted Monday afternoon, has damaged or destroyed more than 100 structures and has forced the evacuation of hundreds of residents in Northern California, near Weed.
On Sunday night, a fiery ball of light ignited across the darkened skies of the northeastern United States, illuminating the heavens in a momentary flash of eerie daylight.
At 6:00 p.m. EDT, Hurricane Hugo was located approximately 400 miles east-southeast of San Juan, P.R. With maximum sustained winds of 140 mph, Hugo was moving west-northwest at 12 mph.
Eastern US (1999)
Hurricane Floyd moves up east Coast. Storm surge at Wilmington, NC measured 10.3 feet. Winds gusted to 80 mph at Atlantic Beach, NC 14" of rain fell over a 2 day period in Chestertown, MD. 6.98" fell over a 2 day period in Philadelphia, PA.
Upper Plains (1881)
General snowfall across NW Iowa and southern Minnesota. A total of 6 inches in Stuart, IA.