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Southwest PA Ozone/PM2.5 Forecast

Small map of Pennsylvania showing counties involved in the sw partnership.
Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
May 3, 2016

 

Date: Tuesday, May 3, 2016
Action Day?:  No
Temperature:  Mid 60s
Discussion:
On Tuesday, expect overcast skies to persist as a frontal system remains stationary across eastern PA. An area of low pressure will make its way up from the Tennessee River valley, allowing rain to develop again across western PA. It will be the cloud cover and the rain that will hold temperatures to the mid 60s while keeping ozone within the good category. PM 2.5 will have a slightly higher air quality value, with the increase in humidity keeping levels closer to the good / moderate threshold.

Extended:
Over the coming days, expect rain to dominate our weather this week as a series of storm systems impact our area. The first such system will allow rain to develop over our area on Tuesday (as outlined above). Higher pressure will build in briefly on Wednesday before the next system pushes in from the Great Lakes. This storm system from the Great Lakes will allow an upper level disturbance to become parked over the northern Mid-Atlantic as we head into the weekend, increasing our threat of rain while keeping temperatures controlled to below normal levels. As this upper level system departs the East Coast over the weekend, we will finally begin to see some sunshine and increasing temperatures. Overall, air quality levels are likely to remain low. Other than a brief spike on Wednesday (thanks to PM 2.5), air quality levels in general are expected to stay within the good range due to the unsettledness in the weather and the cooler than normal temperatures. --Nolan

 

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