By Alex Sosnowski, Expert Senior Meteorologist
October 18,2013; 8:50PM,EDT
As waves of colder air sweep southward from Canada, the first snowflakes of the season will fall on northern portions of Minnesota, Wisconsin and Michigan this weekend.
The combination of progressively colder air and weak disturbances will set the atmosphere up to produce chilly rain showers over the Upper Midwest beginning Friday night in some areas.
Parts of northern Minnesota (and eastern North Dakota) will be the first areas to get some wet snow mixing in Friday night.
A second wave of moist, chilly air sweeping in Sunday night will bring a new batch of snow showers to northern Minnesota and northern Wisconsin, spreading to the Upper Peninsula of Michigan. It is this second round that has the best chance at bringing a small accumulation of snow to hilly areas and on grassy surfaces Sunday night into Monday morning.
The warm waters of the Great Lakes will warm the air slightly but, at the same time, will add some moisture to the the air and make some of the showers heavier.
Where the showers are heaviest and the atmosphere cools enough locally, some wet snow can mix in with the rain and could even change to all wet snow.
Through nearly the end of October, the waves of colder air will keep coming from central Canada and will make more progress south and east around the Great Lakes region.
From Minnesota to Michigan this weekend, RealFeel® temperatures can dip near to below freezing at times during the daylight hours, after including wind, actual temperature, precipitation and other factors.
According to AccuWeather.com Chief Meteorologist Elliot Abrams, "As the pattern continues to evolve, other areas around the lower Great Lakes and the central and northern Appalachians are likely to join in with their first snowflakes of the season."
The pattern has the potential to bring the first accumulating snow to a few areas that receive lake effect.
"The best chance of snowflakes and perhaps ground-whitening snow for parts of the southern and eastern Great Lakes and the higher ground of the central Appalachians appears to be during the middle and latter part of week," Abrams said.
RELATED:
Winter Forecast for the United States
Forecast Temperature Maps
Pattern Change Alert
It is not unusual for a small amount snow to fall in the vicinity the Great Lakes and Appalachians during the second half of October.
Average Snowfall for October*
While the pattern will bring the coldest air of the season so far in terms of daytime highs from the Midwest to New England and the mid-Atlantic, it does not favor snow for the I-95 corridor.
The atmosphere along the coast will generally still be too warm. Only if a storm were to spin up just offshore as the cold air was moving in would there be a chance of snow to fall near the East coast.
On Social Media
Amie Rowland
AmieRowland
Not ready for this: First snowfall could happen this weekend for the upper midwest. #morefallplease accuweather.com/en/weather-new…
Christina Consolo
RadChick4Cast
NOOOoooooo... "As waves of colder air sweep southward from Canada, the first snowflakes of the season are possible... fb.me/SNb2t4tl
Bobpoff
GlobalExpoBob
All you Michigan and Wisconsin, Minnesota and "Upper Midwest" peeps have fun with that! fb.me/30G2kdmJM
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