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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
March 4, 2015

 

Date: Wednesday, March 4, 2015
Action Day?:  No
Temperature:  Near 40
Discussion:
On Wednesday, mostly cloudy skies will persist over southwestern PA as a cold front advances toward our region. Southwesterly flow in advance of the front will allow temperatures to reach near the 40 degree mark. In addition, expect rain to continue to fall over the area. After the cold front moves through during the day, expect colder temperatures to filter, changing over any lingering rain to snow. Overall, with the influx of moisture over the area, expect PM 2.5 levels to remain in the low moderate range.

Extended:
Over the coming days, expect temperatures to brief dive below normal thanks to the frontal passage on Wednesday. Temperatures on Thursday and Friday should remain below freezing thanks to a new area of high pressure building in over the Plains. This high will eventually shift east. The movement of the high will allow temperatures to moderate as we head into the weekend. The warmer air building in will also lead to deteriorating PM 2.5 concentrations after starting the period in the good range. Expect temperatures to continue to warm heading into next week as the overall weather pattern continues to evolve. Therefore, temperatures peaking well within the 40s and low 50s are likely in the Monday to Wednesday time frame. These warm temperatures will continue to keep concentrations within at least the moderate threshold. --Nolan

 

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