When the weather gets hot, the pollution cooks in the San Joaquin Valley and the result is ozone. So, when the temperature hit 110 on Saturday, it must have been a nasty ozone day. Right?

Wrong, I found out. Why? It may actually have gotten too hot for ozone.

The California Air Resources Board online data showed there were no federal violations that day. There also wasn't a federal violation Sunday when the temperature hit 101 in Fresno.

I haven't spoken yet with the experts, but the wind picked up in the afternoon both days. That might have blown out the ozone.

Experts also have told me for years that it can get too hot for ozone. Heat rises, and maybe the hot air just broke through the inversion layer that holds dirty air in the Valley. Poof. The ozone goes away.

By the way, the worst spot in the Valley on Saturday was in Fresno at the First Street monitor where the more stringent state standard was violated. The worst place on Sunday was in Turlock, which also violated the state standard.