The big changes from overnight are upgrades to our weather alerts. A Blizzard Warning is now posted for most of central and northern South Dakota. A Winter Storm Warning takes over for most of the Black Hills and goes across the Wyoming border. The Blizzard Watch remains in place for the Sioux Falls metro area, including Lincoln and Turner Counties.
Much of today will be mild and cloudy. Fog started early and will last for a while. You might want to allow a few extra minutes for travel to scrape your windshield and navigate slick roads. Skies will gradually clear in eastern KELOLAND through the early afternoon.
The storm arrives from Colorado later in the day. Expect snow to begin in the southwestern counties by this afternoon. By late in the evening a rainy mix will move into southeastern portions of KELOLAND. We’ll be too warm at the start for pure snow in the Sioux Falls metro area. We’re still thinking Sioux Falls will get more rain than snow but a healthy snow is still very possible later tomorrow.
After midnight tonight conditions should deteriorate fairly quickly. The low will tighten up and upper support will arrive. That means snow rates will increase and we’ll get banding forming. We’re still predicting two distinct heavy areas of snow. You can see your local prediction in the graphic below.
Snow will continue through the day tomorrow, along with whiteout conditions at times. Snow will be almost impossible to measure, as it will be blowing around and drifting. Even if your area doesn't get too much snowfall, northwest winds could carry snow to you.
The system will eventually move out on Monday. It still looks like winds will be strongest for far eastern KELOLAND on Monday during the morning hours.
After all this clears, we are looking at a calm workweek. Another cold blast moves in Thursday with a chance of snow.