Welcome To The Future

Hi, Oregon. Thanks for stopping by. pic.twitter.com/Y7n6hZmCz6

— Charles P. Pierce (@CharlesPPierce) July 21, 2021

My daughter called from Denver Tuesday night to say the smoke in the air is so bad air quality is seriously compromised. She said the moon (waxing to full) was almost invisible due to the smoke. Before she got off the phone she said the moon had disappeared from the sky.

Fine Particulate Matter concentrations are expected to be in the Moderate category on Wednesday, due to the transport of smoke from in-state and out-of-state wildfires. Unusually sensitive people should consider reducing prolonged or heavy exertion on Wednesday throughout the Front Range region.

Visibility in Denver on Wednesday is expected to be Poor during the morning, with some improvement to Moderate during the afternoon. 

The transport of smoke from out-of-state wildfires will continue on Wednesday across central and eastern Colorado. Some improvement may be seen on Wednesday as weather patterns shift. Although no major public health impacts are anticipated, unusually sensitive people should consider reducing prolonged or heavy exertion on Wednesday, particularly for eastern parts of the state. 

This website mentions smoke from a wildfire in Routt County, which is on the other side of the Rockies from Denver and the Front Range.  The smoke in Denver is coming from Oregon, Idaho, and California.

That's the view from Boulder.  Those aren't clouds.