There is the potential for roadway and airport delays during the midday hours Friday due to downpours in the area.
While the storms will be random with hit-and-miss fashion, they have the potential to cause poor visibility for a short time, as well as flash and urban flooding.
Commuters outside of the immediate Washington, D.C., area can also be affected over the I-66, I-70 and I-95 corridors.
Part of the same system heading into the Washington, D.C., area early Friday brought more than 900 flight delays to the Chicago area Thursday. The state of the system Friday is not as intense as it was Thursday over the Midwest. However, it was producing flooding on roadways in some of the southern suburbs of Pittsburgh to start the day.
Showers and thunderstorms will affect parts of the mid-Atlantic states on Friday as a push of cooler and less humid air sags southward.
During the afternoon and evening, the storms and their downpours will tend to settle over southern Virginia and North Carolina.
In the wake of the front pushing southward, temperatures will trend from slightly above-average to slightly below-average for a couple of days, Saturday and Sunday. Warm and humid air will build back next week.
A tropical threat from the Atlantic on the United States and Caribbean islands may increase into next week.
United States residents may pay higher heating costs this fall as colder air is expected to grip the Rockies and Plains at times and some quick-hitting chilly shots may impact the Northeast.
Rescue efforts are underway in Hiroshima, Japan, after several landslides buried people and caused severe damage on Wednesday morning, local time.
Monsoonal moisture from the tropics slammed the Phoenix area and other parts of the Southwest with heavy rainfall, causing flooding in the region.
A long-lived and intense thunderstorm dumped hail that ended up being measured in feet in some parts of Mexico City Sunday afternoon and evening.
A zone of thundery rain with the risk of flooding and travel delays will occur into the weekend from the northern Plains to the central Appalachians and part of the mid-Atlantic.
Cutbank, MT (1992)
Temperature drops from 87 degrees to 49 degrees in 8 hours.
Houston, TX (1999)
105 degrees, new record for date.
New Jersey (1999)
A few waterspouts were spotted in Delaware Bay, and another at Cape May Point. A waterspout moved inland and became an F2 tornado injured one person in Holgate, New Jersey.