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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
October 31, 2014

 

Date: Friday, October 31, 2014
Action Day?:  No
Temperature:  Low to Mid 50s
Discussion:
An upper level disturbance tracking across the Great Lakes will bring cloud cover and some light precipitation on Friday. Temperatures will be held to the low to mid 50s, just below normal for late October. There is not much moisture associated with this system, so dew point temperatures will remain in the upper 30s to low 40s. With light winds and limited moisture in a currently clean air mass, PM 2.5 concentrations will stay mostly inside the good range. There may be a period of a few hours with moderate readings, most likely occurring during the morning. Average concentrations for the day will be close to the good/moderate threshold with worst case scenario having a few isolated locations inside the low moderate range.

Extended:
The upper level disturbance from Friday will transfer energy to a storm system that will develop just off the east coast on Saturday. Breezy northerly flow will develop on the backside of this system, pulling in dry and colder air to the region. Highs for Saturday and Sunday will likely be the lowest maximum highs we have seen so far this fall. Any isolated moderate levels of PM 2.5 from Friday will fall into the good range as early as Saturday. Locations already experiencing good air quality will continue to do so through the remainder of the weekend. High pressure will return early next week along with a rebound in temperatures to more seasonable levels. --- Roble

 

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