I very much agree with CT DEEP's assessment that what we saw in CT is from other systems in the Southern Plains. Those particles lofted into the atmosphere are (depending on the exact size) very ideal as cloud condensation nuclei, which are particles that water vapor condenses to and form larger water droplets. These droplets then fall to the ground in larger storms, which we've seen a few times now. Given we've had a few predominant low-level SW flow regimes prior to this report, I'm even more convinced it's dust from the Plains.