The coldest air so far this season is anchored over eastern South Dakota. Despite sunshine, places like Aberdeen have struggled to get above zero this Christmas Eve. We expect most of the KELOLAND region to be below zero tonight, and again Christmas night.
Because of the cold air, a wind chill advisory is posted north of I-90, but the north winds are not likely to be strong. It is just plain cold air.
We also have a winter weather advisory in effect tonight and Christmas morning for the southwest corner of South Dakota, including Rapid City and the Black Hills. 2-5 inches of snow is possible in some areas, with dangerous wind chills due to the very cold air. The band of snow could put down up to 2” in south central South Dakota (areas west of the Missouri River).
Temperatures won’t warm up too much on Christmas Day. With abundant cloud cover, we expect single digits in eastern and central KELOLAND, while Rapid City should make the mid teens. Fortunately, it does not look like the winds will be very strong.
Wednesday will be only slightly warmer.
After our cold start to the week, we’re watching a wintry system that could bring a few inches of snow in a broad swath on Thursday night and Friday.
Check out the wind chill advisory map through Tuesday morning: