Thanks to James Bruggers for pointing out that airnow.gov shows daily weather-map animations detailing the extent of pockets of "bad air" over Kentucky, loaded with ozone and other pollutants. So says James on his blog:
Be geeky like me and watch the ozone blobs form over our region. It's all at the EPA's airnow site, here. Click on animation. And come back frequently during the day. The worst ozone levels typically come in late afternoon, or even early evening -- like when folks get out of work and decide to go for a run, or bike ride. Remember, today is a air quality alert day, with officials saying children, older adults, and anyone with heart or lung problems may want to take it easy.