I had an "interesting" time here in Chicago.
The conditions where I was were "questionable" to say the least. There was still some major uncertainty on whether the eclipse would be visible due to the cloud cover. However, there appeared to be breaks in the clouds at around 11:00 am, so I loaded up my bike & trailer, and headed over to Lincoln Park.
There were a number of people already in the park with their eclipse glasses when I arrived, and more showed up as the time passed. Unfortunately, the cloud deck started to thicken, and at around 80% blockage mark, the sun disappeared behind the clouds, and did not re-emerge until about 10 minutes after maximum eclipse (which was between 86% and 87% at my location.)
I was able to make the following observations, though:
1. There was a noticeable darkening of the sky at maximum eclipse, though due to conditions, it was hard to tell how much was due to the cloud cover, and how much to +86% of the sun being blocked by the moon.

However, over at the Chicago Tribune web site, they do have a
time lapse video of the changing conditions during the eclipse from North Avenue Beach.
2. There was also a significant drop in the air temperature at maximum eclipse, which was notice by several people around me.
3. Most surprising were the winds. Before and during the early phases of the eclipse, the air was barely moving; a flag on a nearby building hanged limply in what little wind there was.
At maximum eclipse, however, a breeze developed that came from the south (the direction of the total eclipse.) As time passed the wind gradually shifted from south to east, seeming in time with the passage of the eclipse.
By 2:00 pm, and when < 50% of the sun was covered by the moon, the breeze had "died down," and conditions had returned to what they before the eclipse stated.
Well, on to 2024...
