After the Wednesday night storm, it has sadly taken only a couple of days for the pollution to return. The current situation is quite a bit different from that earlier this week because we have an incredibly strong inversion in place right now very near the valley floor. This morning's sounding showed a surface temperature at the airport of -2.7˚C with the temperature increasing with height to 6.4ºC at 828 mb (5800 ft).
With a strong inversion in place near the valley floor, spectacular conditions are found in the mountains, such as the view below from the top of the Supreme Chair at Alta.
However, a shallow layer of smog lies over the Salt Lake Valley as can be seen looking NW from SR-210 just north of Little Cottonwood Canyon.
The shallowness of the pollution layer is also evident this afternoon in the upper Aves.
I suspect the smog will deepen some this afternoon as the lake breeze pushes southward into the Salt Lake Valley. That is a common occurrence during these shallow inversion events.
A splitting trough coming through tomorrow will try to stir things up. The southerlies in advance of the system were evident on the ridge tops today. It's not a lock, but let's hope it comes through.