More than 80 million from Colorado to Maine are under a winter weather alert as a Winter Storm Scott barrels toward the Northeast. 

The storm dropped several inches of snow in the central US over the weekend. Up to eight inches of snow had fallen in parts of far western Kansas by Sunday morning. 

But most areas of Kansas, Nebraska, Missouri and Illinois that were within the path of the storm had gotten no more than a few inches of snow. 

Forecasters are warning that bitter cold temperatures will follow the storm. 

The Missouri Transportation Department was advising people to stay off the roads if possible on Sunday. The National Weather Service says wind chills could drop below negative 20 in eastern Nebraska on Monday morning.

The snow moved into the Ohio Valley by midday and will move to the mid-Atlantic states Sunday afternoon before spreading into the rest of the Northeast.

New York will get between four to eight inches while Boston is expecting five to 10 inches. Philadelphia will get between two and four inches, according to CNN. 

Snow that fell overnight blanketed much of the Tri-State area on Saturday.

New York City, suburbs north and west of the city and most of Long Island reported three to five inches on Saturday morning. Areas further north and west including the Hudson Valley and the Catskills also saw snowfall. 

Some towns began declaring snow emergencies, ordering cars off the roads as snowplow vehicles removed large build-ups in certain areas.

By Monday afternoon, the storm will move out of the Northeast. Across the Southeast, 14 million people are expected to see severe weather.

Snow fell early on Saturday in Northern Utah, including the Salt Lake City metro area, into southern Wyoming, parts of Colorado and western Nebraska.

Most of eastern Massachusetts, including Boston, was covered in three to four inches of snow with temperatures below freezing on Saturday. Washington DC, also got a dusting of snow with weather warnings in place in parts of Virginia.  

The National Weather Service advised that the storm will move northeastward out over the Atlantic, with ‘heavy snow possible from the Central Appalachian mountains to New England’.

It issued winter weather advisories in other parts of the Great Basin and Plains, from South Dakota to Arkansas and southern Illinois, including Denver, Oklahoma City, Kansas City, and St. Louis.

Temperatures are expected to hover on the 40-degree line through the weekend before falling back into the 30s Monday.

And conditions are expected to deteriorate quickly along the East Coast as the coastal storm approaches the region by Sunday evening. 

Six inches are predicted for most of New York but areas north may see up to a foot of snow from Sunday into Monday morning, according to NBC’s Storm Team4.

And commuters have been advised to expect substantial travel delays, including some flight cancellations particularly on Monday.

Schools that are scheduled to be open on Monday may have delays or closures as adverse weather will make travelling conditions challenging. 

AccuWeather reported that a swathe of six to 12 inches of snow in mountainous areas is forecast to extend from eastern Pennsylvania and eastern New York state to central and eastern New England with the fast-moving storm. 

Across parts of the Midwest, the snow could pile up fast enough to strand motorists along major highways on Sunday. 

At its peak, the snow may fall at a rate of one to two inches per hour.

The combination of the storm track and proximity of mild air is expected to cause rain or a mix of rain, sleet and snow to fall during the height of the storm along the Intestate 95 corridor from Washington, DC, to Baltimore, Philadelphia, New York City and Boston. 

The storm is the latest in a string that has dumped record levels of snow and rain this winter.

Weather experts said the culprit is an atmospheric river of moisture coming from north of Hawaii. 

The phenomenon has become frequent enough that scientists in California are introducing a 1-through-5 scale of intensity for atmospheric rivers, similar to those used to gauge hurricanes.

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