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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
November 23, 2014

 

Date: Sunday, November 23, 2014
Action Day?:  No
Discussion:
A warming trend will begin on Saturday and will continue through Monday, bringing some respite from the recent mid-winter-like weather. It will still be colder than average on Saturday, but a shift to southwesterly flow will pump warm and humid air into the Philadelphia metropolitan area, bringing temperatures to about average on Sunday and to near 70 F on Monday. The arrival of warm air aloft will inhibit atmospheric mixing and allow particle concentrations to rise to the mid-Moderate range over the weekend. Rain associated with the arrival of a warm front will overspread the area from south to north overnight Monday into Monday morning. This precipitation will reduce particle concentrations but they will remain in the Moderate range.

Extended Forecast

Date

11/23/2014

11/24/2014

Ozone

WHITE

WHITE

PM

YELLOW

YELLOW


Extended:
A cold front will arrive on Tuesday. Particles will linger in the low Moderate range until the new air mass is able to fully build in behind the frontal passage. -Huff

 

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