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 has set the atmosphere up to produce chilly rain showers over the Upper Midwest this weekend.
Enough cold air was already in place for wet snowflakes to start to fall across northern and central Minnesota and northern Wisconsin Saturday night.
Ahead of another blast of cold air, a storm system is set to spread a couple of inches of snow from northern North Dakota to northern Minnesota and neighboring parts of Ontario through Sunday night.
More rain and snow showers will follow for Monday across Minnesota, Wisconsin, upper Michigan and northern Ontario on Monday.
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.
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.
*Some of these locations, and others, could get some snowflakes from the upcoming pattern.
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.
Major Hurricane Matthew will pose severe risks to lives and property across Jamaica, eastern Cuba and Haiti early next week.
Hurricane Matthew will take a northward turn this weekend, which will bring the storm along the Atlantic coast of the United States next week.
Chaba remains on track to become a powerful typhoon and could threaten lives and property across the Ryukyu Islands and mainland Japan this week.
Rounds of beneficial rain will fall over drought-stricken portions of New England into Monday.
The worst thing that people who live along coastlines can do is not to prepare for tropical storms and hurricanes.
Deadly Typhoon Megi slammed parts of Taiwan and China with damaging winds and landslides, while snow fall across parts of the Intermountain West.
Valdez, Alaska (2004)
Flooding and mudslides result in numerous road closures.
Second severe hurricane in two weeks struck the Carolinas -- destroyed Onslow, Co. Courthouse along with all its records. Beacon Island disappeared.
Gulf States/ Carolinas (1837)
H.M.S. Racer dismasted in Gulf of Mexico. Famous Racer's Hurricane swept from Texas through Gulf States to Cape Hatteras.