Hot and humid right on through Sunday for the Twin Cities metro. Our Autumnal Equinox at 3:02 PM, is the official beginning of the fall season. However, it certainly doesn't feel like fall. As the equinox hits, the heat which was building all summer in the western states, comes blasting in with highs in the 90°s and heat index values close to 100°. A stalled frontal boundary over Western Minnesota stretches from about Marshall up towards Duluth will be the primary location for waves of showers and thunderstorms tomorrow through Sunday. The metro looks to be too far east with only a slight chance of an isolated shower/t-storm Saturday afternoon. Meanwhile, temperatures will top out again close to 90 tomorrow and then middle 80s on Sunday. The stalled front out west will move east starting Sunday night and bring scattered showers and thunderstorms through the Twin Cities mainly on Monday. Behind this front temperatures will fall below average from Tuesday and through most of next week. A few showers are possible Thursday afternoon/evening as another front moves through. If you're planning on traveling to view our fall foliage, next week offers plenty of dry days, just have to watch shower potential on Thursday.