Today, however, I'm at the office and taking a closer look at those murky skies. The sounding from this morning shows a very deep cold pool over the Salt Lake Valley, with a capping inversion based at around 775 mb, which is at an altitude of 2264 m (7428 feet).
Consistent with the deep cold pool and more elevated inversion, the Cliff Cam at Snowbird shows smog and stratus extending ominously up Little Cottonwood Canyon.
|Source: Utah Division of Air Quality|
So, the bottom line is that when you see stratus and pollution tonguing up to Snowbird, that's probably "good" for valley residents. On the other hand, it could mean you being exposed to some pollution at mid elevations in the canyons.