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)
Data Not Available
Forecast Discussion: Current Conditions: As of 2 PM on Monday, partly cloudy to mostly cloudy skies prevail over the region (from west to east) as high pressure remains in place over the area. A disturbance over the southeastern US is creating scattered showers over portions of the Mid-Atlantic and the clouds will continue to expand northward across most of the Mid-Atlantic (which is reason why some of our area is under cloud cover). Right now, light southwesterly flow persists over the area. These winds are, in turn, causing temperatures to rise into the mid to upper 70s. After levels originally rose late last week, PM 2.5 concentrations are continuing to hover in the moderate range. These readings will remain elevated tomorrow as warm and moist conditions continue to reside over southwestern PA. *** Tuesday's Forecast: So for Tuesday, partly to mostly cloudy skies will continue to persist over the region as high pressure remains the primary feature in control of our weather. We will, however, see a disturbance swing through the eastern Great Lakes. As it does, we could see a chance of shower over isolated portions of the region (better chance in northern areas). For the most part though it will remain dry. Light westerly flow will help drive temperatures toward the mid 70s during the afternoon. The warm and moist conditions over the region will help enhance PM 2.5 formation, resulting in moderate air quality. *** Extended Outlook: Over the coming days, expect high pressure to continue to dominate our weather early in the period. This will lead to above normal afternoon temperatures and sustained moderate air quality. At the same time, a storm system will begin to take shape over the Plains. This system will gradually move east. By Friday, we should see our first signs of the system pushing in as rain develops over our area. The storm system, along with its cold front, will clear our area by Saturday afternoon. A new area of high pressure will build in on the backside. This high will tap into a more fall-like air mass residing over Canada and drive it southward into our area. As a result, expect cooler conditions over the weekend coupled with good air quality. --Nolan

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