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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
August 23, 2014

 

Date: Saturday, August 23, 2014
Action Day?:  No
Temperature:  Near 80
Discussion:
On Saturday, mostly cloudy skies will persist throughout the day as the weak frontal system, which has been over the area for the past several days, continues to lag across the region. This will focus precipitation across our area. Therefore, expect isolated showers to develop over the region. Light easterly flow will hold temperatures near the 80 degree mark. Air quality levels are expected to stay elevated due to the humidity over the region. Ozone will stay in the good range due to the cloud cover while the PM 2.5 stays near the good / moderate threshold due to the humid conditions over the region.

Extended Forecast

Date

8/23/2014

8/24/2014

8/25/2014

Ozone

GREEN

GREEN

YELLOW

PM

YELLOW

YELLOW

YELLOW


Extended:
As we take a peek into next week, we notice that the week will start off on the sunny and warm side thanks to an area of high pressure parking itself over the Northeastern US. These conditions should keep ozone and PM 2.5 levels within the moderate threshold for at least a couple of days. By the middle of the week, the area of high pressure over the Northeast will begin to move eastward into the Atlantic. At the same time, a new frontal system will begin its approach on the Great Lakes / Ohio Valley. This system is slated to push through our area during the second half of the week. As it pushes through, expect another round of showers. Once it moves through, a new area of high pressure will build in and drive cooler and drier air in for the weekend. So after the first half of the week resided in the moderate range, expect good air quality to move in to end the week. --Nolan

 

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