Starting around 07Z last night, we noticed a station in the far northeast corner of Colorado reporting some reduction in visibility, with no other stations nearby reporting any reduction. We couldn’t see any indication in the 11u-3.9u IR satellite imagery. Once the VIIRS DNB imagery came in of the 09:04UTC imagery set, it was definitely evident in the Nighttime Microphysics channel, slightly in the Dust RGB channel, but not at all in the other DNB channels. Good to know the sensor was reporting correctly!
Seen above, top to bottom: VIIRS DNB Reflectance RGB, IR Longwave, Dust RGB, Nighttime Microphysics imagery. The latter definitely shows the small patch of fog clearly with the whiter (lower) clouds.