I was worried the weather would be too dicey, but it actually turned out to be nearly perfect. There was just one pretty big thing missing...
Instructor and I walk out to the hangar.
He calls the other instructor, whose first words are "Did you have the plane tonight?" Turns out yesterday was the bi-annual inspection of the pitot system. The other instructor flew down for inspection and expected to fly right back, but the altimeter didn't pass. So the old girl is stuck at the other airport getting a new altimeter installed.
Such is life. I would much rather fly safely next week with a new altimeter than have flown with a questionable one yesterday.