One more hot and very humid day on tap for tomorrow before some serious relief arrives thanks to an unusual pattern developing for the upcoming week. Not much change tonight or early Sunday, but by afternoon enough weakness in our upper ridge for a slight chance of afternoon or evening thunderstorms. Otherwise one more day of heat/humidity with highs in the low 90s and dew points in the mid to upper 70s. Humidity occasionally will spike in advance of a summer cold front so heat index numbers could actually be a bit higher tomorrow. But by late Sunday night into Monday cooler and gradually less humid air will sweeping in…along with a good chance of showers and thunderstorms ahead of and along the cold front.
The upper pattern next week will feature a hot upper high over the west and a cooler upper trough over the northeastern U.S. This is bad for the west (think record heat and wildfires) but it will mean a much more pleasant airmass for the Heartland, with slightly below average air temps and much lower humidity levels....along with mainly clear skies. Dew points should drop to around 60 by Tuesday thru Thursday…which will seem desert-like after this week. This will allow for cooler nights as well. Longer range we slowly get warmer and more humid again by late next week…with our next chance of showers late next weekend.