Heavy rain will raise the risk of flooding across more than a dozen states in the Southeast on Presidents Day to the East Coast on Tuesday.
The flood threat will initially target the metro areas of Nashville, Tennessee; Jackson and Hattiesburg, Mississippi; Birmingham and Montgomery, Alabama, on Monday.
Rainfall will total 1-3 inches across many areas over a 6- to 12-hour period. In addition to the flood threat, locally severe thunderstorms may erupt.
"Locally damaging winds and even an isolated tornado will be possible across Louisiana and Mississippi on Monday," AccuWeather Senior Meteorologist Henry Margusity said.
Blinding downpours and ponding of water could dangerously reduce visibility and lead to hydroplaning along interstates 20, 55, 10, 59, 85, 40 and 75. Flash flooding could force officials to shut down some local roads.
The heavy rain will then sweep into Atlanta, Tallahassee, Florida, and Charlotte, North Carolina, on Monday night.
Following a period of snow and ice, rain will drench the mid-Atlantic and Northeast on Tuesday and New England on Tuesday night.
Commuters who travel along the Interstate 95 corridor, from Washington, D.C., to New York City and Boston, may face treacherous travel conditions and long delays on the roadways during Tuesday. Delays at the airports are possible as well.
"Tuesday's rainfall will be the first significant rain event in the I-95 corridor since Jan. 10," AccuWeather Senior Meteorologist Dave Dombek said. "The hardened, frozen ground will contribute to the amount of runoff and flooding."
In most cases, flooding will occur in low-lying and poor-drainage areas along with smaller streams in the mid-Atlantic and Northeast.
"The threat for ice jams in the larger rivers will not be significant threat since the rain and accompanying warmup will be so brief," AccuWeather Senior Meteorologist Brett Anderson said.
In addition to the risk of flash flooding, strong onshore winds will pile water up along the coast and create a coastal flood threat from the Carolinas to New England Monday night into Tuesday.
A powerful storm tracking from the Southeast to the Appalachians will be responsible for the torrential rain. There will be enough cold air on the northern and western side of the storm to bring a widespread snow and ice threat to the East.
Colder, but mainly dry, weather will sweep into the East during the middle of next week as the storm races into Canada on Wednesday.