UWFPS 2017 daily cold-air pool forecast valid Tuesday 2/14/2017 1:30  PM MST

A weak inversion episode continues, with PM2.5 levels exceeding 20 micrograms today in the Salt Lake Valley and Cache Valleys. A weak but notable complex late-season inversion has set up across the area.

SLC Airport Sounding 2/14/2017 5 am. Note multiple stable layers

Continuing modest pollution build-up is expected in pollution through Thursday morning as a strengthening capping inversion tries to strengthen in the presence of being modified by heating of snow-free ground in the Valleys.   Partial mix-out is expected Thursday late afternoon with the increase of southerly winds, with and end of episode expected Thursday night. Periods of stormy weather and no air quality concerns expected from this Friday February 17th through about February 23rd.