The big story over the coming days will be the chilly, fall-like feel. Some record low temperatures are in jeopardy tonight as a strong high pressure sets up over the High Plains. The lowest readings should come in the east, specifically NE SD. The center of the colder air is in northern Minnesota and Canada. The records are 47° for Sioux Falls, 44° in Aberdeen and 43° for Rapid City. All were set in 2005.
If you’re out tomorrow morning, you might want to bring a jacket. If clouds try to build during the morning, the warm-up will be slowed. As it is, we’re only looking for highs in the 70s. The winds won’t be quite as strong, but this just isn’t a favorable pattern for warmth. Still, it should be a great day to get outside.
The one little thing to watch for will be showers forming in central Nebraska late in the afternoon. It doesn’t look like they’ll be able to reach South Dakota but they might get close.
Sunday looks about the same, except about five degrees warmer or so. Late on Sunday, a line of storms comes in from the Wyoming and Montana. We’ve got the chance of scattered showers in the forecast for Rapid City but others will remain dry. The chance of rain does increase on Monday and Tuesday. The best bet for storms near Sioux Falls is late in the day but it’s still a long way out and things will change. Along with the rain, we’ll steadily warm closer to seasonal readings. Summer isn’t over yet!