Liberty/Clairton area
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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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Southwest PA Air Quality Partnership is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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AQI - Pollutant Details
Particles (PM2.5)
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Forecast Discussion: Current Conditions: As of 2 PM on Thursday, partly cloudy skies persist over the region as high pressure continues to control our weather. Right now, the high is generally centered across the eastern US. Winds over our area are out of the southwest, resulting in warmer temperatures across western PA. Readings are now hovering in the mid 70s. Air quality levels have also increased as temperatures have risen. PM 2.5 levels are well within the moderate range while the cloud cover continue to hamper ozone development. Expect this trend to continue into tomorrow as we see a bigger threat of showers move in over the area. *** Friday's Forecast: So for Friday, a mix of sun and clouds will prevail through the day as a disturbance makes its way through the southeastern US. The southerly flow over our area in advance of this system will help keep conditions seasonably warm and more humid. Therefore, this disturbance should trigger shower development as we head into the afternoon. The additional clouds and rain chances during the afternoon will hold ozone levels down but should help to keep PM 2.5 levels in the low to mid moderate category. *** Extended Outlook: Over the coming days, expect temperatures to remain near normal as a weak disturbance impacts our area early in the period. Here is how things are shaping up... Over the weekend, expect the threat of showers to persist over our area each day as a weak storm system makes its way up along the East Coast. This system should push out into the Atlantic during the early portions of next week. As it does, our flow will turn more westerly and result in seasonable temperatures over our area. Another weak frontal system will pass through western PA during the second half of the week, resulting in showers over our area. This frontal passage will set the stage for a larger system to push through during the weekend. Overall, air quality levels are expected to remain elevated during the period, primarily due to PM 2.5's ability to thrive in a warm and moist environment. --Nolan

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