The past weather system have led to only isolated fires across the United States. The MODIS Terra animation (top left) illustrates relatively low AOD as well, even though clouds cover the northern half of the US. The MODIS AOD trajectory shows that in the upcoming days will also stay relatively clear ahead of the possible storm coming Sunday.
The EPA AIRNow combined AQI loop (bottom left) details moderate to unhealthy AQIs across the western portion of the United States while much of the East has had good AQIs throughout the day. The high AQI currently is in Visalia, CA (165), and Salt Lake City, UT just recently dipped below unhealthy levels to 148. The OMI NRT tropospheric NO2 column (bottom right) has smaller values than typical for NO2 in the Northeast and Midwest, perhaps attributing to the better air quality today in the wake of winter storm Hercules.