DEP declares Air Quality Action Day for Friday, Jan. 15

Air Quality Action Day has been declared for Susquehanna Valley, PA, on Friday, Jan 15
Tomorrow’s Forecast
Friday, Jan 15: 105 AQI Unhealthy for Sensitive Groups Particle Pollution (2.5 microns)

Extended Forecast
Saturday, Jan 16: 45 AQI Good Particle Pollution (2.5 microns)
Current Conditions: As of 2 PM on Thursday, mostly sunny skies prevail over the region as an area of high pressure across the southeastern Us dominates our weather. Right now, southwesterly winds coupled with the sunshine have allowed temperatures to climb into the upper 40s across the region. The combination of the warm air and the light winds across the area have allowed PM 2.5 levels to creep up into the moderate range. Expect levels to climb even higher tomorrow as a more stable air mass builds in for a good portion of the day. *** Friday’s Forecast: So for Friday, expect clear skies in the morning to give way to partly cloudy skies during the afternoon as we remain influenced by an area of high pressure. With the high building into the western Atlantic, expect the ridge to extend northwestward into the northern Mid-Atlantic region. At the same time, a new storm system will begin to take shape across the southeastern US. This system is slated to make its way up the East Coast later in the day. For much of the day, winds should be light over the region. Warmer air will continue to build in from the southwest aloft. It is these warmer conditions coupled with the light flow at the surface that will allow an inversion to form over the area. During the morning hours, the inversion is likely to fairly strong. As we move through the day, expect the inversion to break down as the surface temperatures warm (afternoon temperatures should peak in the mid 40s) and the storm approaches from the south. The intensity of the inversion during the morning hours along with the light winds will limit mixing within the boundary layer, allowing PM 2.5 levels to climb. With these kind of conditions persisting for much of the day, expect PM 2.5 levels to reach the Code ORANGE status, which is why we are issuing an Air Quality Action Day for PM 2.5.

Days when particle pollution levels are expected to be high:

* Reduce or eliminate fireplace and wood stove use.
* Avoid using gas-powered lawn and garden equipment.
* Avoid burning leaves, trash and other materials.

 

This forecast is brought to you by the Pennsylvania Department of Environmental Protection (PA DEP) and the Air Quality Partnership of the Susquehanna Valley.

* For more information on the health effects of PM 2.5 and ozone, visit the EPA Airnow website.
* To see the current forecast and monitoring information for the Southwest PA Region, visit us online at the PA DEP Forecast and Monitoring Site.
* To find out more information about the Air Quality Partnership of the Susquehanna Valley, visit the AQP of SV Website.

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