Electric Green Sky
After an intense, very cold outflow boundary surged past us, more severe thunderstorms developed along it just to our SW. The cloud line in the lower-middle and right of this image was a roll cloud along that outflow boundary. The thunderstorm became rooted in an elevated unstable layer as the boundary continued SW, but kept spewing CGs down through the cold air. Yes, it was daytime! Sunset was an hour away; but because it was so dark under that storm (which was itself under than anvil of a big tornadic supercell near Muleshoe), I could run multi-second exposures. The whole lighting of the environment, as seen in person, was simply surreal.
1 WNW Tulia, TX (3 Jun 89), looking WSW.