Air Quality Archives Page 2 of 5 - Clean Air Board of Central Pennsylvania

DEP declares Code Orange alert for ozone on July 6

July 5, 2023/in Air Quality Action Day/by Clean Air Board

DEP Declares Code Orange Air Quality Action Day for Ozone for July 6, 2023 in Lehigh Valley-Berks Area and Susquehanna Valley Area

Current Conditions: At 2 p.m. EDT this Wednesday afternoon, skies were mostly sunny across the region with temperatures moving into the lower 90s. Ozone continues to develop near the ground, and most locations will have maximum concentrations reach the moderate range. With limited mixing, fine particulate (PM2.5) will also reach moderate levels. The heat is expected to continue through the day Thursday, with a slow cooling trend beginning Friday. A more unsettled weather regime is likely to occur over the weekend, with increasing chances for showers and thunderstorms. The increasing convective activity will keep ozone and PM2.5 levels down in the moderate range by Saturday. Now, here are the forecast details: *** Thursday’s forecast: An Air Quality Action Day is in effect for Thursday! Partly to mostly sunny and hot with ozone developing rapidly in the late morning and afternoon, with code ORANGE concentrations in parts of the area. A thunderstorm will also develop in parts of the area during the late afternoon. Fine particles will again average moderate, with the highest levels coming during the morning as an inversion is expected.

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Thursday, Jul 6

Tomorrow’s Forecast
Thursday, Jul 6:	101 AQI	Unhealthy for Sensitive Groups	Ozone
	60 AQI	Moderate	Particle Pollution (2.5 microns)

* This air quality forecast was prepared by the Pennsylvania Department of Environmental Protection (DEP).

* Current air quality monitoring data for the Susquehanna Valley Area and other locations across Pennsylvania can be found at the EPA’s AirNow Interactive Map.

DEP declares Air Quality Action Day for June 17

June 16, 2023/in Air Quality Action Day/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Saturday, Jun 17

Tomorrow’s Forecast
Saturday, Jun 17:	101 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)
	56 AQI	Moderate	Ozone

Extended Forecast
Sunday, Jun 18:	68 AQI	Moderate	Ozone
	65 AQI	Moderate	Particle Pollution (2.5 microns)
Monday, Jun 19:	73 AQI	Moderate	Ozone
	55 AQI	Moderate	Particle Pollution (2.5 microns)
Tuesday, Jun 20:	70 AQI	Moderate	Ozone
	55 AQI	Moderate	Particle Pollution (2.5 microns)
Wednesday, Jun 21:	60 AQI	Moderate	Ozone
	55 AQI	Moderate	Particle Pollution (2.5 microns)



Current Conditions: At 2 p.m. EDT this Friday afternoon, a low pressure system moving through the state was bringing plenty of cloudiness to the region as well as a couple of showers and thunderstorms. Ozone concentrations have been held to the good range, and PM2.5 has also been lowered some by the rainfall, mostly down inside the good range. Wildfire smoke will continue to be a concern over the next several days, and the air quality situation will continue to be monitored through the weekend. With increasing sunshine and warmer air, especially Sunday into Monday, ozone concentrations will also be a concern. Here are the forecast details: *** Saturday’s forecast: An upper level low pressure system over New England Saturday will bring breezy northwest winds to the area with more sunshine. Ozone levels will rise, and be at the low end of the moderate range. With wildfire smoke still coming in from Ontario, and with the latest smoke models showing some near surface smoke, PM2.5 will rise to the low code ORANGE range, with highest concentrations during the morning. **

* This air quality forecast was prepared by the Pennsylvania Department of Environmental Protection (DEP).

* Current air quality monitoring data for the Susquehanna Valley Area and other locations across Pennsylvania can be found at the EPA’s AirNow Interactive Map.

DEP extends Air Quality alert to Friday, June 9

June 8, 2023/0 Comments/in Air Quality Action Day/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Friday, Jun 9

Tomorrow’s Forecast
Friday, Jun 9:	125 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)
	45 AQI	Good	Ozone

Extended Forecast
Saturday, Jun 10:	100 AQI	Moderate	Particle Pollution (2.5 microns)
	55 AQI	Moderate	Ozone

Current Conditions: As of 2 PM on Thursday, the word of the day continues to be smoke, thanks to the ongoing forest fire situation across eastern Canada. The smoke that has infiltrated the Commonwealth continues to make its presence felt in terms of our air quality. As expected, the poor air quality conditions from this morning have reversed coarse somewhat. As the morning went along and the inversion, which helped to trap the high levels of PM 2.5 near the ground for a good portion of the morning hours, broke, the winds began to pick up as more vertical mixing occurred. The winds, in turn, forced PM 2.5 levels to drop drastically from the values recorded this morning. However, we are not completely out of the woods yet (pun not attended here). Over the past couple of hours, PM 2.5 levels have leveled off, resulting in more Code ORANGE – Code RED conditions instead of Code PURPLE conditions. For the rest of today, winds are not expected to increase drastically. Therefore, some level of smoke will still remain over the region. Then an inversion sets up shop this evening thereby keeping PM 2.5 concentrations in the Code RED range for today. In addition to PM 2.5, we are watching ozone, as levels have risen over the past few hours. That is the benefit of the thinning smoke signature allowing more sunshine and more photochemistry to occur. Expect continual improvements in the air quality tomorrow. *** Friday’s Forecast: So for Friday, expect the worse air quality conditions to persist during the morning hours as the smoke, which remained in place Thursday evening, carries over into the Friday morning. The plume that will be residing over the area will not be as dense as the one existing over the region on Thursday morning. Therefore, we do not expect PM 2.5 levels to be as high. Then, later in the day, the levels will drop as more mixing occurs. In addition, the threat of afternoon showers exist as a disturbance makes its way northwest to southeast across the area. These showers will also help PM 2.5 levels to drop. Afternoon temperatures will continue to be on the cooler side of normal, with highs ranging in the low 70s. It is the combination of the higher PM 2.5 that is expected during the day and the lower PM 2.5 expected during the afternoon that will help to keep PM 2.5 daily averages in the Code ORANGE range. Ozone levels will be in the good range thanks to the increased cloud cover limiting the photochemistry needed for ozone formation.

DEP extends Air Quality Alert to Thursday, June 8

June 7, 2023/0 Comments/in Air Quality Action Day/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Thursday, Jun 8

Tomorrow’s Forecast
Thursday, Jun 8:	130 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)
	65 AQI	Moderate	Ozone

Extended Forecast
Friday, Jun 9:	100 AQI	Moderate	Particle Pollution (2.5 microns)
	70 AQI	Moderate	Ozone

Current Conditions: As of 2 PM on Wednesday, the skies over eastern PA remain smoke filled as we continue to feel the impacts of the forest fires in eastern Canada and the positioning of an area of low pressure over Nova Scotia, Canada and an area of high pressure over the Hudson Bay region of Canada. The northerly wind flow that has persist for much of the day continues to drive the smoky air southward across the Commonwealth. Right now, we have a very thick plume of smoke over the region. This is allowing PM2.5 levels to reach into well into the unhealthy category. Expect the worse air quality impacts to continue to persist through the evening as the winds die down in the overnight period. *** Thursday’s Forecast: So for Thursday, expect the smoky conditions that have persisted over the past two days to continue to persist through much of the day. The highest air quality levels are expected to occur during the morning hours, as the air mass that settled in Wednesday night continues to persist over our area. Expect the air quality levels to begin to drop during the day thanks to a slight transition in the overall weather pattern. The main low pressure system over Nova Scotia will begin to retrograde (i.e. move from east to west) across the eastern Canada. This westward movement will change the orientation of the winds over PA. Model guidance indicates that the plume will actually shift further to the west, thus relaxing the onslaught of smoke over eastern PA. We will keep an eye on this situation around the clock and issue an update to this forecast in the morning, if necessary. Afternoon temperatures will stay slightly below normal, with highs in the low to mid 70s. Even with the declining levels of PM 2.5 expected, overall averages should at least remain well within the Code ORANGE range.

DEP extends Air Quality alert to June 7

June 6, 2023/0 Comments/in Air Quality Action Day/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Wednesday, Jun 7

Tomorrow’s Forecast
Wednesday, Jun 7:	147 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)
	76 AQI	Moderate	Ozone

Extended Forecast
Thursday, Jun 8:	93 AQI	Moderate	Particle Pollution (2.5 microns)
	80 AQI	Moderate	Ozone

Current Conditions as of 1 PM on Tuesday: Wildfire smoke has moved overhead from fires in Canada which has degraded the air quality across the region. Concentrations of fine particulate matter (PM-2.5) remain elevated while the smoke/haze has limited ozone formation under otherwise mostly sunny skies. *** Wednesday’s Forecast: An area of low pressure centered close to Maine/Nova Scotia with high pressure to the northwest will continue the northerly flow on Wednesday. This northerly flow will bring more waves of wildfire smoke into the region over the course of the day. With the wildfires to the north continuing to be fueled by dry conditions with breezy winds, the threat of periods of elevated concentrations of PM-2.5 close to the surface will remain. An Air Quality Action Day will be declared once again for Wednesday due to the risk of hours with higher concentrations being observed. Areas where the thicker plumes manage to miss will see concentrations in the higher end of the moderate range on average for the day. With the smoke causing hazy conditions, ozone formation will again be limited. Locations with a lower density of smoke overhead will see higher amounts of sunshine reaching the surface which may allow for moderate levels of ozone concentrations to be observed. *** Extended Outlook: Similar conditions may continue Thursday so transport of the wildfire smoke with the northerly flow will continue to be monitored. At a minimum, moderate air quality is expected for both PM-2.5 and ozone concentrations. The area of low pressure will finally begin to be pushed eastward on Friday. This may not end the threat for periods of elevated concentrations due to the smoke for Friday but may at least begin a transition to an improvement in air quality conditions for the weekend. Some much-needed rainfall may even arrive for the second half of the weekend. –

DEP declares Air Quality Action for Tuesday, June 6

June 5, 2023/in Air Quality Action Day/by Clean Air Board

DEP declares Ozone Action Day for May 12 in Susquehanna Valley

May 11, 2023/0 Comments/in Air Quality Action Day/by Thomas Au

Clean Air Board files comments to EPA on PM2.5 standards

March 27, 2023/in CAB in the News/by Clean Air Board

March 27, 2023 – The Clean Air Board of Central Pennsylvania submitted comments to the US Environmental Protection Agency on proposed revisions to the air quality standards for fine particulate (soot). CAB urged EPA to tighten the standards to protect vulnerable populations and the general public. Recent medical studies have shown that even low levels of airborne soot pollution can cause harmful health problems. CAB asked EPA to adopt an annual standard of 8 micrograms per cubic meter (8 ug/m3) and a 24-hour standard of 25 micrograms per cubic meter (25 ug/m3). Read the CAB comments.

Air Quality Action Day declared by PA DEP for Susquehanna Valley for Nov. 24

November 23, 2022/in Air Quality Action Day, Miscellaneous/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Thursday, Nov 24

Tomorrow’s Forecast
Thursday, Nov 24:	102 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)

Extended Forecast
Friday, Nov 25:	75 AQI	Moderate	Particle Pollution (2.5 microns)
Saturday, Nov 26:	50 AQI	Good	Particle Pollution (2.5 microns)
Sunday, Nov 27:	39 AQI	Good	Particle Pollution (2.5 microns)
Monday, Nov 28:	34 AQI	Good	Particle Pollution (2.5 microns)

Current Conditions: A strong high pressure system over the Mid-Atlantic states is producing sunny skies and mild air this Wednesday afternoon. A morning inversion resulted in elevated fine particle (PM-2.5) levels, and limited mixing this afternoon is keeping overall PM-2.5 in the moderate range. Tonight, another inversion will develop, and fine particle pollution will tend to get trapped close to the surface once more. *** Thanksgiving Day forecast: An Air Quality Action Day will be declared for the day Thursday!! PM-2.5 will end up being highest prior to noon, with slightly better air quality during the afternoon. PM-2.5 concentrations will reach code ORANGE, especially in and around the Lancaster area. Otherwise, skies will be mostly sunny with a mild afternoon. *** Friday’s forecast: A weak cold front will bring more clouds and rain showers to the region Friday. PM-2.5 concentrations will still be elevated during the morning Friday, but increasing afternoon west to northwest winds should keep average concentrations down in the moderate range.

DEP declares Air Quality Action Day on Oct. 23 for Susquehanna Valley

October 22, 2022/in Air Quality Action Day, Miscellaneous/by Clean Air Board

A(n) Air Quality Action Day has been declared for Susquehanna Valley Area, PA, on Sunday, Oct 23

Tomorrow’s Forecast
Sunday, Oct 23:	102 AQI	Unhealthy for Sensitive Groups	Particle Pollution (2.5 microns)

Extended Forecast
Monday, Oct 24:	95 AQI	Moderate	Particle Pollution (2.5 microns)
Tuesday, Oct 25:	70 AQI	Moderate	Particle Pollution (2.5 microns)

Current Conditions: Light winds are producing very little dispersion across the area this Saturday afternoon, and fine particle pollution (PM2.5) levels in the area will end up well into the moderate range. A strong inversion is likely to increase particles again tonight. *** Sunday’s forecast: An Air Quality Action Day will be declared for Sunday! High PM2.5 levels during the morning hours Sunday will send daily averages into the code ORANGE range, mainly across Lancaster County. The highest PM2.5 will come prior to 11 a.m. Sunday morning. A light northeast wind will improve air quality during the afternoon. *** Monday’s forecast: PM2.5 will continue to be an issue as we move into the new workweek. Light south to southeast wind will again not allow for a good deal of mixing, so high moderate air quality is again likely. *

Tag Archive for: Air Quality