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MIDWEST Storm:

Well, The Midwest better prepare for the upcoming snowstorm. Up to 2 feet could be possible in some parts.
Lets starts with how much QPF the models are putting down.
The NAM, (Which sometimes over does the storm) Puts at much as 2.5 inches of Liquid down! If it was a 10:1 ratio, that would come out to 25 inches of snow!
The GFS puts the heaviest QPF in a different area, and it isn't as strong. It has 1.00-1.25 inches of liquid at the Minnesota, North Dakota Border.
The Euro has been showing this storm all along. It looks like the NAM, with 2.00-2.5 inches of liquid!

Now lets look at where the Low should track.
All models are starting to go towards where the EURO has had it all along.
The EURO has the low tracking from the Colorado to the  Minnesota border and then weakening and getting pushed East.
EURO Below:

The GFS now looks a little bit similar to the EURO. The GFS also has the Low coming out of Colorado and tracking towards the Minnesota border, to get pushed east and weaken.

GFS Below:
                                             
The NAM, like the other two models, have the low coming out of Colorado, tracking toward Minnesota. Except, the NAM has the low traveling a little further North before getting pushed East.  It has the Low tracking over Wisconsin and Michigan.

NAM Below:

Lets talk about POTENTIAL Snowfall amounts.
All models are putting out AT LEAST 12 inches + for this storm over South Dakota, North Dakota, Minnesota, Wisconsin, and maybe Upper Michigan.
YOU NEED TO PREPARE FOR THE WORST. This will be the largest storm this year.
Here is what I am looking at right now:

Light Blue= Light Snow

Middle Blue= Moderate Snow

Darkest Blue= Heavy Snow

Things are looking more and more likely that there could be a Lower New England Snowstorm.
The EURO has showed this storm all along for the North East, and now all the models are trending towards it.
The EURO shows the storm coming out of Colorado and tracking North over Minnesota. Then, the storm turns east and weakens because of a strong high in Canada.
As it turns North, it re-spawns another low off the Coast of Maryland, and tracks it North. This type of storm is called a Miller B storm, which is known to give the North East major Snow Storms.
Now, What do the other models show?
GFS shows something similar, that takes the storm through Minnesota, turns it East, and re-spawns a low. On the GFS, the low is a little weaker, and it is a little further North. That is why it doesn't produce a lot of snow for the North East.
The NAM shows the storm a little further North at hour 84, but the full storm isn't in range yet. 

In terms of Snowfall?
This is what the EURO Shows:                       (March 2nd, at 7AM) 

GFS Snowfall:

Feb. 29th, 7PM                                                            Mar. 2nd, 7AM

NAM:

 Wed Feb 29 7PM   (Not all the snow that falls, doesn't go out that far)

Along with the Heavy snow,there is a chance of some severe storms.
SPC Outlook for Tues-Weds.

There could be some strong storms with the storms on Tuesday in the places shown above.
More about that Tonight into Tomorrow.