Fantastic Friday Followed By A Hot & Humid Weekend
We saw something rare here on Thursday. O'Hare saw a high of 83° and a low of 65° for an average day in terms of temperature. This was only the second day this month with temperatures right at average. Every other day this July has been above average with the month running 5.4° above overall so far.
Today should see highs maybe a degree or two warmer but just moderate humidity for a beautiful Friday with a mix of sun and clouds. It will be a bit cooler along the lakefront with lower 80s there.
Heat and humidity build though after today and by Sunday highs should be in the lower 90s. Humidity levels increase too and start to approach oppressive levels.
The combination of heat and humidity this weekend will make it feel like the lower to middle 90s on Saturday with heat index values climbing to or just above 100° on Sunday.
Our next threat of showers and thunderstorms doesn't arrive until late Sunday into Monday. Those storms could tap into all that available moisture and make for some torrential rains in spots.
The steamy conditions on Sunday won't last long. More seasonable warmth returns next week with highs mostly in the middle 80s. The long range forecast of temperature probability for the end of July and start of August has us near normal from July 29th through August 2nd and then favoring above average temperatures overall from July 31st to August 6th.
The longer range forecast for the week ending August 14th has the midwest favored for cooler than average temperatures overall. This signal has been very strong in this particular set of models hinting a shift to a cooler pattern could be coming for the middle of August.
Here is my 7 day forecast:
Today: Partly to mostly sunny High: 85 (82 Lakefront)
Saturday: Mostly sunny, hot & humid Low: 68 High: 90
Sunday: Partly cloudy, hot & humid, sct. t-storms late Low: 75 High: 92 (Heat index near 100°)
Monday: Partly/mostly cloudy, sct. showers & t-storms Low: 73 High: 84
Tuesday: Partly to mostly sunny Low: 65 High: 86
Wednesday: Partly to mostly sunny Low: 68 High: 87
Thursday: Partly to mostly sunny Low: 69 High: 86