Unusual circular reflections on our windows before sunset

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Unusual circular reflections on windows were observed on November 4, 2024, around 3:50 PM, attributed to the sun being visible between clouds. The observer, who has lived in the house for 37 years, noted this phenomenon while raking in the backyard, indicating it was a first-time experience. The windows in question are Anderson double-pane, which may contribute to the distortion. The circular pattern is likely a result of the windows not being perfectly flat, causing a unique reflection of the sun and clouds. This discussion highlights the interplay of weather conditions and window design in creating unexpected visual effects.
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We were outside raking in the afternoon November 4, 2024 when we noticed an unusual circular pattern on the windows. It was around 3:50 in the afternoon. The sun was visible between layers of clouds. We have lived in this house for 37 years and working in the backyard this time every year but never noticed anything like this before.
The windows are Anderson double pane. I would love to know what caused this. Thank you!

IMG_1806 2.jpeg
 
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See this thread. Your windows aren't quite flat, in short, so you're seeing a distorted reflection of the sun and probably illuminated clouds.
 
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