|Fog, smog, and dreary skies over the Salt Lake Valley this morning|
When an inversion is in place, a strong upper-level trough passage can blow out the pollution, improve the air quality, and usher in clearer skies. On the other hand, a weak trough passage just gives us a blanket of dreary mid and upper-level clouds and just enough precipitation to moisten up the low levels and increase the fog coverage.
That's just what has happened over the past 24 hours, and we're left not only with fog and dreary skies, but also plenty of pollution as PM2.5 levels have been highly elevated and well above National Ambient Air Quality Standards.
|Source: Utah Division of Air Quality|
Park City Readers:
If you are looking to buy Secrets of the Greatest Snow on Earth at a local retailer, I signed three copies for retail sale at Jans yesterday (1600 Park Avenue). Get them while they last. Dolly's Bookstore should also have some in stock soon, so give them a call and put it on reserve.