Accompanying a potent November arctic outbreak, the season's first significant snow, not simply a few flakes, is on the table for the upcoming week in parts of the Plains and Midwest.

(MORE:Expert Analysis|Winter Storm Central)

Yes, it's time to make sure that snowbloweris ready to go or the snow shovels are dug out of storage deep in your garage.

Let's break down what we know right now.

Monday's Forecast

(Areas of forecast snow are shown in blue. Areas in pink denote a zone of rain or snow.)

Tuesday's Forecast

(Areas of forecast snow are shown in blue. Areas in pink denote a zone of rain or snow.)

Timing

-Sunday:The most significant band of snow will fall from parts of Montana into parts of the Dakotas. A second area of lighter snow may dust parts of the western Great Lakes (Wisconsin and Michigan).

- Monday:Snow, possibly heavy in spots, from the High Plains of Montana and Wyoming into South Dakota, mainly the southern half of Minnesota, northern Iowa, much of Wisconsin and mainly northern Michigan. Some snow may develop late into parts of Colorado (both mountains/foothills and plains), northwest Kansas, Nebraska and Iowa as the arctic front plunges.

-Tuesday: Snow may persist from eastern Iowa into northern Michigan. Any rain may change to wet snow farther south over northwestern Missouri, northern Illinois, southern Wisconsin and southern Michigan.

How Much Snow?

It is a bit too early to nail down specific snowfall totals in any location. However, the map at right gives a general flavor for what we're expecting.

Forecast Snow Potential

In general, a roughly east-west swath from far eastern Montana and the Dakotas to Minnesota, Wisconsin and Michigan has the highest potential of seeing six inches or more of snow.

Surrounding that area to the north and south will be lighter amounts, where an inch or more of snow is possible.

Keep in mind, as with most winter storms, this forecast snow footprint could shift a hundred miles or so as new forecast data comes in over the next day or so. Therefore, it's important to monitor for changes in your forecast as we head into the work week.

(FORECAST: Denver |Pierre | Twin Cities | Green Bay | Chicago)

Winter storm watches and winter weather advisories have already been posted in parts of the High Plains.

(MORE: Winter Weather Alerts)

Potential Impacts

- Interstates that may become snow-covered and slipperyMonday morninginclude stretches of I-90, I-94, I-35 and I-29 in parts of Minnesota, the Dakotas, northern Wyoming and Montana. Some blowing snow may reduce visibility, particularly in rural areas.

- TheMonday afternoon/eveningcommute may become difficult in parts of northern Michigan, Wisconsin, southern Minnesota and South Dakota, in particular, due to falling and accumulated snow. Some blowing snow may reduce visibility. Flight delays possible at Minneapolis/St. Paul and Denver (snow), as well as Chicago O'Hare & Midway (low clouds near the warm front).

-Tuesday, any drizzle or light rain that had coated roads from parts of Iowa to Indiana may freeze, as the arctic front plunges. Snow-covered roads could still a problem in northern Michigan, Wisconsin. Flight delays possible at Chicago O'Hare and Midway.

First Snow of Season Perspective

Average first 1 and 6-inch daily snowfalls. (NOAA/NWS)

Among the cities that may see their first one-inch-plus snowfall from this system include: Denver, Sioux Falls, Madison and Grand Rapids.

The season's first one-inch-plus snow day typically falls around Veterans Day in Sioux Falls, the following week in Grand Rapids and around Thanksgiving in Wisconsin's capital city.

It's notable the season's first six-inch-plus snow day, however, waits until the first half of January, in an average year.

(MORE:Record Earliest Measurable Snow Where You Live|America's Snowiest Cities)

Denver still hasn't picked up even measurable snowfall so far this season. The third week of November is historicallythe latest dates on record where the Mile High City finally received its first measurable snow.

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