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Susquehanna Valley Ozone/PM2.5 Forecast

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Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
March 3, 2015

 

Date: Tuesday, March 3, 2015
Action Day?:  No
Temperature:  lower 30s Tuesday
Discussion:
Clouds will thicken up early on Tuesday in response to low pressure coming out of the Midwest. Precipitation will start as snow and sleet Tuesday afternoon prior to turning to all rain Tuesday night. Highs Tuesday in the lower 30s with near steady or slowly rising temperatures Tuesday night. Precipitation should not be heavy enough to bring air quality below the moderate range, so moderate PM concentrations will be expected through Tuesday night.

Extended:
Things will be on the mild side for the middle of the week with precipitation finally taking the form of rain. Temperatures will climb in into the 40s after a lengthy absence at this level. Winds will shift into the northwest late in the day, but be on the light side. Therefore, I expect moderate concentrations of PM2.5 will be the rule. We then have to be concerned about a cold front stalling out just to our south Wednesday night into Thursday. With colder air moving in, snow is a possibility during this period. Stronger northerly winds will bring PM down into the good range. High temperatures may remain close to 30. High pressure then builds in and provides a sunny, but cold day on Friday. Over the weekend, a westerly flow will bring mainly dry weather with temperatures moderating closer to normal. Limited mixing late in the week into the weekend will mean PM concentrations in the lower moderate range on average. --McAuliffe

 

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