This is just strange. I drove to the gym, came back a couple hours later, and found a puddle of coolant under my car. I added some water to the radiator, not very much at all, so it didn't leak much. The weird part is that I drove it afterwards and there was no leak.

We had a cold snap here and it got down to 20 Fahrenheit and it's warmer now. Doesn't seem like enough to do anything, but I thought I'd add that in case. I took a couple of pictures from where it was leaking.

Could this just be normal heat expansion/overflow? Seems strange. I did have a shop work on the condenser/radiator 4 months ago, but maybe that's a coincidence.
​​​​​​​