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Southeast PA Ozone/PM2.5 Forecast

Small map of Pennsylvania showing counties involved in the se partnership.
Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
August 22, 2014

 

Date: Friday, August 22, 2014
Action Day?:  No
Discussion:
Friday will be another unsettled day, with scattered showers and thunderstorms continuing to impact the Philadelphia metropolitan area. Mostly cloudy skies will keep ozone in the Good range, but another day of light winds and rising humidity will be enough to push particles into the Moderate range.

Extended:
A strong area of high pressure over QC will begin to extend southward on Saturday. Temperatures and humidity will start to decrease as onshore winds pick up and transport clean maritime air into Philadelphia. Mostly cloudy skies will continue, with lingering chances for scattered showers. Air quality will be in the Good range. The sun will return on Sunday as surface high pressure advances farther south from Canada. Sustained onshore flow will continue the trend of cooler and less humid weather, with another day of Good air quality. -Huff

 

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