USA, New York, New York City, Madison Avenue, people walking in snow
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A potent storm will develop and organize a swath of drenching rain and accumulating snow over a large part of the eastern United States spanning Sunday and Monday.

Precipitation from the storm early next week will be preceded by light snow associated with an Alberta clipper storm moving across the Upper Midwest on Saturday.

Snow Spreads
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The storm early next week is likely to gather more moisture and produce heavier precipitation when compared to the clipper storm on Saturday and from the storm from Thursday night to Groundhog Day.

As a result, impact from the early-week storm may be significant in terms of travel and daily activities.

Those with flights or long-distance travel on the highways from Sunday to Monday may want to monitor the development and progress of the storm as a result.

"The ingredients are there for a big storm, but there is some competition with other lesser storms on the map, due to the busy weather pattern," according to AccuWeather Chief Broadcast Meteorologist Bernie Rayno.

Storm to deliver drenching rain in coastal mid-Atlantic, southern US

Storm Threat
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Rain will gather over the lower Mississippi Valley and upper Gulf of Mexico coast during Saturday night and Sunday morning. Downpours will develop and thunderstorms are likely to erupt near the Gulf coast.

"We expect the fast motion of the storm to prevent widespread flash flooding of small streams," according to AccuWeather Expert Storm Warning Meteorologist Tyler Dewvall.

Abnormally dry to severe drought conditions persist in the Southeastern states, according to the United States Drought Monitor.

However, downpours may be heavy enough to cause urban flooding in parts of the South, coastal mid-Atlantic and southeastern New England as the storm moves along into Monday.

Motorists across the Interstate 10, I-20, I-85 and other corridors in the South and along much of the I-95 corridor in the East can expect delays related to excess water on the roads and poor visibility.

Similarly airline delays related to fog or a low cloud ceiling are likely in the major hubs of Atlanta, Charlotte, North Carolina, Washington, D.C., Philadelphia, Baltimore and New York City at the height of the storm.

A few communities in the Interstate 10 corridor may get a gusty thunderstorm as well.

Snow may blanket areas from Ohio Valley to New England

Enough cold air will be in place for snow to fall on the storm's northern and western flank. The question is: Will this area of snow be poorly organized and spotty in nature, or will a long swath of moderate to heavy snow develop?

Motorists should be prepared for wintry driving conditions along portions of Interstate 70, I-71, I-76, I-77, I-80, I-81, I-87, I-88, I-90, I-91, I-93 and I-95 in the northeastern part of the nation.

Airline delays due to deicing activity are likely in Boston and Pittsburgh and possible in Cincinnati, New York City, Philadelphia and Baltimore for a time.

At this time, the area where some snow is likely to develop first with the storm is in parts of northern Kentucky, Illinois, Indiana and Ohio on Sunday.

From there, snow is likely to spread northeastward across parts of northern West Virginia, Pennsylvania, New Jersey, upstate New York and central and northwestern New England during Sunday night and Monday.

Whether or not the rate of snowfall becomes heavy in a narrow zone will depend on how quickly the storm strengthens. Meanwhile, the dividing line between rain and snow will depend on the track of the storm.

At this time, the most likely zone for accumulating snow will extend from parts of the Ohio Valley to the central Appalachians and central New England.

A more eastward track may bring this swath of all or mostly snow to a line from Washington, D.C., to Philadelphia and New York City.

A more westward track may allow rain to mix in as far west as the Ohio Valley, central Appalachians and central New England. In this case, the greatest amount of snow may fall from the eastern Great Lakes to northern New England.

Expect more waves of cold air with frequent storms

In the coming weeks, the overall weather pattern will remain very active as waves of arctic air from in the northern half of the nation clash with mild air in the Deep South.

At the same time, some communities may be affected by a storm every one to two days.

AccuWeather will continue to provide updates on this storm and others during the busy wintry weather pattern through February.