Clutching at Straws
Driving kilometre after kilometre through entirely featureless fog led me to it.
If I stayed still enough in my seat, I could see if the twilight blue was becoming lower on the horizon when compared to the top of the windscreen, which would mean the fog was thinning. Was that a brighter star appearing for a moment or just a dash light reflecting on the windscreen? And then - scattered cloud. Perfection!
Seeing stars was fine too, but you knew that seeing some very defined scattered cloud meant the fog was lifting.