Accuweather says potential is there for snow and wintry mix late in week

Forecast Challenges

Just as the chance that the western Canada and southern U.S. storms may fail to come together, leaving spotty light snow from the Ohio Valley to the East, there is still the potential the two late-week storms to fully merge.

The latter would produce a swath of heavy snow over part of the South and farther north over the mid-Atlantic and southern New England.

Because of the extend of arctic air, it will not take a great deal of moisture to produce several inches of snow. In this case a tenth of an inch of liquid (rain) could yield 3 inches of snow. A typical liquid to snow equivalent for storms in the East is 10 to 1, where a tenth of an inch of water would yield an inch of snow or an inch of water would yield 10 inches of snow.

The arctic air has already unleashed locally heavy lake-effect snow even in areas missed by the path of the general storms this week.

The dense arctic air is playing a major role in driving the storms farther south.

AccuWeather.com will have further updates on the potential for snow as the week progresses. Remember to refresh your browser as we will be doing live edits within this story.

 

Alex Sosnowski, Expert Senior Meteorologist for AccuWeather.com

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