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Susquehanna Valley Ozone/PM2.5 Forecast

Small map of Pennsylvania showing counties involved in the sv partnership.
Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
January 31, 2015

 

Date: Saturday, January 31, 2015
Action Day?:  No
Temperature:  middle to upper 20s Saturday
Discussion:
High pressure will continue to build in from the west on Saturday, resulting in more sunshine and lighter winds in the afternoon. Still rather cold with the mercury remaining in the middle to upper 20s. Enough mixing will still occur to keep PM2.5 levels in the upper good range. Partly cloudy and not as cold Saturday night with fine particulate increasing once more. *** Sunday's forecast: Clouds will increase on Sunday out ahead of a storm developing in the Midwest. Light winds during the day will cause more moderate levels of PM. A little milder Sunday with temperatures in the lower to middle 30s. Low pressure tracking just to the south of us will bring periods of snow Sunday night into the midday hours of Monday, and there is the potential for several inches of accumulation if enough cold air remains in place over the area. *** Monday's forecast: Low pressure will slowly move off the Delmarva peninsula out to sea on Monday, turning precipitation off in the afternoon. Winds will increase from the north Monday afternoon, bringing air quality back down into the good range. Temperatures should hold steady or slowly fall during the afternoon. High pressure then builds over the region Monday night into Tuesday. With snow cover present, a strong temperature inversion can develop early Tuesday if winds drop off rapidly Monday night, adversely affecting air quality. PM should remain in the moderate range overall on Tuesday.

Extended Forecast

Date

1/31/2015

2/1/2015

2/2/2015

Ozone

WHITE

WHITE

WHITE

PM

GREEN

YELLOW

GREEN


Extended:
High pressure then moves off to the east on Wednesday, allowing for a cold front to approach later in the day. We will continue to watch a developing storm in the southeastern US to see if it can link up with the cold front. More snow can result for the area if this scenario plays out, but it remains too early to tell. An area of greater forecast confidence is that another Arctic blast will follow whatever system develops for the latter part of next week.---McAuliffe

 

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