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AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
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Air Quality Partnership of Lehigh Valley - Berks
Air Quality Partnership of the Delaware Valley
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PA Allergy & Asthma Association
Pennsylvania DEP - BAQ - Contacts
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Southwest PA Air Quality Partnership

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Air Quality Forecast
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Air Quality Index (AQI)
Health Message: None
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AQI - Pollutant Details
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Forecast Discussion: Current Conditions as of 3 PM on Tuesday: Scattered showers and thunderstorms are currently developing across the region and will continue into this evening in advance of a cold front that is expected to slide through the region tonight. A brief improvement in air quality conditions, as well as humidity, will occur on Wednesday before a return to more moderate levels for late week. *** Wednesday’s Forecast: High pressure will begin to build from the west on Wednesday, behind the cold front that will have pushed east of the forecast region Tuesday night. A slightly drier air mass will move in, providing some relief of the July-like humidity that we have seen over the past few days. Ozone concentrations will remain inside the good range. Temperatures will climb above normal values once again with highs in the mid 80s. *** Extended Outlook: After a brief break from the humidity on Wednesday, a surge of more humid air will return north as early as Thursday. The area of high pressure will slide more overhead and then just to our east on Thursday, turning the flow at the surface and aloft back to south/southwesterly once again. This will allow temperatures to reach the upper 80s with dew point temperatures returning to uncomfortable levels in the upper 60s to low 70s. Ozone concentrations may push into the higher end of the good range under mostly sunny skies. Similar conditions will continue on Friday before the next cold front arrives over the weekend. Timing of this next system may impact air quality conditions for Saturday. --- Roble

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