The northern tier is receiving a winter wallop from a fast-moving Alberta clipper. For Minneapolis-Saint Paul, this is the heaviest snow since March, and it's causing some holiday travel headaches. You can see conditions deteriorating in Saint Paul in the video above.

Alberta clippers are systems known for bringing snow and wind to the northern tier, and you can see one right now on the WeatherRadar. This combination of wind and snow is reducing visibility and causing treacherous travel conditions from North Dakota to Illinois this morning. Widespread 2-4" of snowfall are possible, but snow totals upwards of 6 inches are possible in some spots.

Slick roads will impact travel throughout the day. The WindRadar also shows wind gusts upwards of 40 mph on the backside of this system, meaning low visibilities will remain a significant issue even after the snow ends. Today, travel trouble can be expected in cities like Bismarck, N.D., Minneapolis, Green Bay and Milwaukee, Wis.

The Minneapolis-Saint Paul International Airport is a major hub for air travel, and there has already been a ground stop this morning. Flight delays and cancellations in and out of this major airport are possible, so if you are traveling by air, check with your airline before heading to the airport.

The TemperatureRadar also shows much colder air moving in behind this clipper and lingering into the weekend. Check in with the Weather & Radar app often for the latest conditions in your neck of the woods.