Upper Midwest radar loop ending at 8 PM CST. Source, WSI.
Doesn't look like much now, but snow will gradually increase across the Southern half of Minnesota during the next few hours...The snow area will lift toward the north/east Overnight.
Mid-Evening water vapor satellite image and low pressure/mid-upper trough locations. Purple area represents 140+ knot upper level winds. Source, College of Dupage website.
*8 PM: New model guidance is rolling out. There is no major change in the 00z NAM or in the 21z SREF models.
*Snow should really start to blossom during the next several hours to our southwest. Still expecting snow to move into the Twin Ports between 1-3 AM Tonight with around 1" or so of new snow accumulation by around 6 AM Tuesday.
*The majority of the snow should fall before 1 PM Tuesday in the Twin Ports. Could be some heavier bands of snow Tuesday A.M. with hourly snowfall rates possibly up to 1".
*Around 4" of total snowfall accumulation here in Duluth and Superior with a lesser chance for up to 5".
*Quick moving system, so as I've been saying all along, it might be difficult to get more than 3-4" of snow out of this system, but if a heavier band of snow can setup over the same area for a few hours, then it's certainly not out of the question to pick up around 5" of snow before the snow tapers off Tuesday Afternoon.
Refer to my previous post below for additional information -- including my snowfall map, and NWS winter weather headline information.