For the last week, N. FL has been sitting in a large moist pocket, and usually by 2am the fog/mist would reach critical mass to shut everything down. Last night, it just couldn't quite come together and the result was the full-on milk bowl effect.
What made it more weird was that aided, you were still IMC, but could see. Unaided, because of the super-hi light moon, there was no sky, there was no ground, there was no horizon...just a bright nothing with lights scattered on the ground. It was like a photo negative of what it's like at sea on deployment with no moon.
Coming back to base, I was talking with the crew trying to figure out what the actual legality was. The weather everywhere was reporting VFR. We we were meeting Class E and Part 135 Class G mins. But we were still IMC while aided. It was just a topic of conversation versus an actual concern, but it was an interesting condition to be flying through.