We’re already off to a warm and muggy start for your Sunday. Temperatures didn’t move all that much overnight, as lows fell only near 70° as expected. With strong August sunshine (and plenty of it) we’ll be very hot by day’s end. While the temps won’t exactly be record-setting, the heat indices could top 100° yet again. A Heat Advisory remains in effect and an Excessive Heat Warning has been added for the Twin Cities metro area.
Here’s the setup: a large dome of high pressure sits over the Southern Plains. Most of the Plains are nearly cloud free, including KELOLAND. We will have SOME clouds moving through today, since we’re on the northern fringe of the system. Closer to home, a stationary boundary hasn’t budged over the past 12-16 hours. It can still be seen on VIPIR and FutureScan between Summit and Rapid City.
Because of that, a humid south breeze will continue this morning, particularly East River. It will feel swampy early on, even with that decent breeze around. Eventually that boundary has to move south and winds will diminish late today. While clouds are possible, mainly on the southern edge of this, showers remain a big long-shot. It’ll be humid, just not enough for storms to be form easily.
Tomorrow looks much the same as today. By Tuesday, it looks like there will be some shower chance in North Dakota. Initially it looked like Aberdeen could see these, but that’s pushed north now. Wednesday will be just slightly cooler, but barely enough to notice. Heading into Thursday, the pattern begins to drop south and west. That could allow a few stray showers into East River. Right now, it’s looking more promising for MN and IA counties. We expect sun through early in the weekend with some indications that a new, cooler pattern could move in next week.