What's worse than being at the right place at the right time? Teaching instead of flying.
At noon the wind made a favorable switch at Marshall, so I called a student and said we are ON. Sure enough ideal thermalling condition by the time we are at Marshall at 2:30 pm: Light wind and smoother-than-usual thermal lift with little drift. So I get to watch my visiting student sky out, despite not following my suggestion to get back over the top of the ridge where lift should be better, with a reply over the radio... "But there is lift everywhere".
Around 4:15 pm, the flow started reverting back to North. But while it lasted, this was a sweet place to be for a handful of pilots.