Overcast skies will continue to hang around our region through much of the overnight. Fog will likely return to areas with a snowpack and also river valleys tonight. There is still a decent amount of low-level moisture in play.
We’re also watching weak little waves in western South Dakota and in North Dakota. These both bring slimmer chances of light snow tonight and into tomorrow morning. In the Black Hills, light snow has been fighting to reach the ground this afternoon and most computer models don’t put much snow out tonight for Rapid City. The thin snow band heading for Aberdeen tonight could lay down half an inch in just a few spots near high prairie.
The wind comes out of the west tomorrow and many of us will be just a bit warmer. The biggest storm of the workweek arrives from our south late Wednesday into Thursday. We have been talking about this storm quite a bit over the past four days. It still looks like the northern part of the storm will graze the southern edges of South Dakota. The chance for snow is better in northwest Iowa because this storm will bend back northwards as it passes us.
The issue with this is all placement. There will be a heavier snow band on the north edge. Many tools suggest this will be near Sioux City. But that could be just enough to the south that we don’t see that much near Sioux Falls. The cutoff between good snows and nothing should be very quick. Still, though, we’re watching Iowa.
Late this week, we will get some sunshine to go along with morning lows near zero.
Many are wondering about Christmas. It looks like colder air will be moving in from NW Canada but we’re still a long way out.