UPDATE:
So this happened a week ago, last Friday. I called the dealer and they gave me an appointment for the following day, Saturday. I took the car to the dealer and explain to them about the leaking and showed them some pictures I had taken. They also agreed that it must be the coolant. "Luckily," the car started leaking when I was at the dealer and they could see what I was dealing with. After giving it a good inspection, they found that the radiator had a tiny hole which was causing the leak. How that hole got there, they couldn't tell. Anyway, I told them (and they knew) that I had just had the car serviced there in January and that my 3-year warranty had just expired in that same month. I left the car there over the...