People spending time outdoors or traveling in the zone from Arkansas and Tennessee to New York state and New England should be on the lookout for drenching showers and thunderstorms on Saturday.
Since the atmosphere will begin to wring out the moisture from the air ahead of an advancing cool front, there is the potential for multiple downpours and storms with lightning strikes.
A few of the storms have the potential to bring urban flooding and brief strong wind gusts.
If you will be outdoors, such as at high school or college football games, be on the lookout for changing weather conditions. If you can hear thunder, you are at risk for being struck by lightning.
Check in with AccuWeather's MinuteCast which is a patented minute-by-minute, highly localized precipitation forecast to keep informed on exactly when it will start and stop raining at a precise street address or GPS location.
The downpours and thunderstorms will be most widespread during the afternoon and evening hours, when the risk of flooding and gusty winds will also be the greatest.
People traveling on the roadways or airlines should be prepared for possible delays. This includes the cities of Nashville, Atlanta, Baltimore, Philadelphia, New York City and Washington, D.C.
Slowly advancing cooler, less humid air will end the threat of downpours and storms by Sunday over Arkansas and Tennessee, as well as the northern Appalachians, as well as much of the Northeast. However, another round of showers and thunder is in store for the Southeastern states, including areas from Atlanta to Richmond, Virginia.