The (variably) darkened sky and lowered sight distance during daytime caused by a dust storm tends to turn off/on at random intervals (going to normal, full bright sky) ranging from a short flicker in about a minute to effectively completely turning off indefinitely, while the wind blown particles are still visible flying around.
It also happens with the night time version of the effect, at least I guess that the storm version of the night sky is the deep red haze instead of the usual black sky with starfield. The flickering seems to be of the same frequency as during the day at that specific location.
It may have something to do with how far the player is from the center of the storm inversely, at least the closer I got to the WayStat that was reporting the lowest visibility, the frequency and length of the darkening effect turning off increased until it completely went away. Moving away from the center seemed to cause it to gradually turn back on more and more frequently.
It is also possible that it actually has more to do with where the player is on the map. I seemed to have the effect more consistently on in the North-East area of the map, gradually turning off while moving towards South, and almost completely gone around the location of the East Hab location.
Customer support service by UserEcho