This is often the time of year when the final peak days of warmth mix in with stronger Canadian systems. That’s exactly what we’ve got in store for the week to come. Highs will reach near 90° by midweek while lows for some others will close in towards the 30s. We’ve also got a few chances of rain later on this week.
High pressure moving into Minnesota would normally help scour out dense, gray stratus clouds. Bu t the light winds aloft struggled today to do just that. We’re FINALLY starting to get some clearing in Aberdeen. There’s some moisture that remains trapped in the NE and that should lead to patchy fog forming tonight. This (or low-level clouds) is most likely east of Aberdeen and into Minnesota. These are the areas that saw the most rain.
A stronger south breeze takes over West River tomorrow. That will spur a warm-up for Rapid City and somewhat for Pierre. Tomorrow should be a mild/cool day, depending on your comfort level. Otherwise, it should be fairly quiet.
A small patch of moisture closes in on Sioux Falls Tuesday morning. This one comes from Kansas and should stick to our far SE zones. The forecast in the extended gets much more interesting. There’s a big low pressure center that shows up in all of our tools. This will initially be based in Montana before it moves into Canada. Ahead of that, we’ll be very warm (if not hot). The tail of it brings us all a chance of rain by midweek and also a decent cooldown.