["month", "day_of_month", "day_of_week (1=Monday)", "ozone [pphm]", "500 millibar pressure height (m) measured at Vandenberg AFB", "Wind speed (mph) at Los Angeles International Airport (LAX)", "humidity (%) at LAX", "temp. Sandburg [F]", "temp.  El Monte [F]", "Inversion Base Height (feet)", "Pressure gradient (mm Hg) from LAX to Daggett, CA", "Inversion base temperature (degrees F) at LAX", "Visibility measured at LAX [miles]"]