As much of the United States prepares for a winter storm that is forecast to dump well above 12 inches of snow in some places this weekend, many are wondering: How much snow are we actually getting? 

The slow-moving system will bring heavy snow, sleet and freezing rain to states spanning from the Southern Rockies to New England through Monday, the National Weather Service says.

The weather service has issued winter storm watches and warnings spanning more than 2,000 miles, and at least 17 states and Washington, D.C., have declared states of emergency.

Winter storm snow forecast

This map from CBS News meteorologist Nikki Nolan shows forecast snow totals for states nationwide, with some states possibly seeing up to two feet of snow in some areas.

Texas and Southern Plains winter storm forecast

Oklahoma City could get between 18 and 22 inches of snow, while Tulsa is forecast to get between 18 and 20 inches. Amarillo, Texas, could see between 12 and 14 inches, while Little Rock, Arkansas, could see up to 12 inches. In the Dallas area, ice and sleet are the main concern, but there could also be a couple of inches of snow. 

Ice is a major concern across the Southern Plains and Southeast, with parts of Texas, Louisiana, Arkansas, Mississippi and Tennessee possibly seeing 0.75 inches of ice or more.

Ohio Valley winter storm forecast

Columbus, Ohio, and Indianapolis are forecast to see up to 12 inches of snow, while Louisville, Kentucky, could see as many as 22 inches. Pittsburgh could get a foot of snow or more. The forecast for St. Louis ranges from 7 to 14 inches of snow.

Northeast and Mid-Atlantic winter storm forecast

The Baltimore, Washington, D.C., and Philadelphia areas are forecast to get between 10 and 14 inches of snow. The Boston area could get between 12 and 18 inches of snow, while New York City is forecast to see between 10 and 18 inches.