Current conditions: *** An Air Quality Action Day is in effect for Thursday***. A significant morning inversion coupled with very light westerly winds will cause fine particulate levels to reach the code ORANGE threshold during the day, but the highest PM2.5 concentrations are most likely during the morning hours. Under a partly to mostly sunny sky, the afternoon will also be a mild one. 


*** Extended forecast: As winds become more south to southeasterly Friday, better air quality will occur, but concentrations will still be in the moderate range. A cold front moving through Friday night will also bring some rain to the Delaware valley Friday night into Saturday morning, then air quality should improve to the good range with temperatures closer to normal over the weekend.---McAuliffe

Here are some Air Quality Action Day tips you can follow to help reduce pollution:

Days when particle pollution levels are expected to be high:

* Reduce or eliminate fireplace and wood stove use.
* Avoid using gas-powered lawn and garden equipment.
* Avoid burning leaves, trash and other materials.


For more information, visit DEP at, EPA’s AirNow at, or Delaware Valley Regional Planning Commission’s Air Quality Partnership at


To follow air quality in PHL between forecasts: "aqforecast" at

For more information, contact the Air Quality Partnership at 215-238-2860.