Pennsylvania air quality

Kenmar, Pennsylvania Air Quality

Lycoming County41.253, -76.959

The nearest monitor to Kenmar, at Montoursville, 2 miles away, measured an index of 18 at Sun, 4:00 PM EDT, which is Good for ground-level ozone. Pennsylvania Dept. of Environmental Protection forecasts Good for Williamsport today and Good tomorrow.

Measured now
18 · Good
Today
30 · Good
Tomorrow
34 · Good
Pollutant
Ozone

Fine particles on the map

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Kenmar, Pennsylvania. Open it for the live map, where it pans and zooms.

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Kenmar, Pennsylvania Open the live map with the particulate forecast

Map layer from NOAA National Air Quality Forecast Capability. Boundaries from the Iowa Environmental Mesonet.

Alerts in force

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force near Kenmar right now. All Pennsylvania warnings.

Now

Good

Nearest monitor
Montoursville, 2 miles away (site 420810100)
Index measured
18 · Good
Measured at
Sun, 4:00 PM EDT
Ozone
19 ppb
Reporting area
Williamsport, PA, 2 miles away
Reported by
Pennsylvania Dept. of Environmental Protection
Area index
24 · Good

Measured, not modeled. AirNow observations are preliminary until the operating agency certifies them, which happens months later.

Today and tomorrow

Pennsylvania Dept. of Environmental Protection's own forecast for Williamsport, written by a forecaster rather than read off a model.

DayCategoryIndexPollutant
TodayGood30Ozone
TomorrowGood34PM2.5
Tuesday, September 22Good35PM2.5
Wednesday, September 23GoodOzone

The forecaster’s discussion

Written by Pennsylvania Dept. of Environmental Protection for Williamsport and filed with AirNow.

Current Conditions at 3 p.m. EDT this Friday afternoon: High pressure pushing southward is bringing partly sunny skies across the area with low values of fine particles (PM2.5) and ozone. Good air quality will continue through most of the forecast period with a much cooler and unsettled pattern starting Sunday. Here are the forecast details: *** Saturday’s forecast: Areas of fog to start, then skies turn out mostly sunny Saturday. PM2.5 and ozone will average in the good range as highs reach the lower 70s. *** Sunday’s forecast: Mostly cloudy Sunday with showers and a thunderstorm as an extensive area of low level moisture moves in. PM2.5 and ozone continue in the good range with highs in the upper 60s. *** Monday’s forecast: Overcast and cool Monday with a few showers under an easterly flow. Highs will only reach the lower to middle 60s, which will be the coolest daytime readings since last May. *** Extended forecast: A cool and unsettled pattern will continue as we move into the fall season Tuesday and Wednesday with showers and even some steadier rain likely. Fall begins at 8:04 pm EDT Tuesday evening. Temperatures will be limited to near 60 as a cool air damming pattern sets up east of the Appalachians as a frontal boundary is stalled out to the south. Air quality mainly in the good range.---McAuliffe

Hour by hour

NOAA’s National Air Quality Forecast Capability, bias-corrected against monitors, for this town’s own coordinate. The worst hour ahead is an index of 32, Good, around Sun, 8:00 PM EDT, from the run issued Sun, 8:00 AM EDT. This is a model, not a measurement.

HourIndexCategoryPM2.5Ozone
Sun, 10:00 AM EDT10Good1.7
Sun, 11:00 AM EDT12Good2.5
Sun, 12:00 PM EDT16Good3.7
Sun, 1:00 PM EDT19Good4
Sun, 2:00 PM EDT22Good4.7
Sun, 3:00 PM EDT26Good5.3
Sun, 4:00 PM EDT28Good5.423
Sun, 5:00 PM EDT28Good5.224.8
Sun, 6:00 PM EDT27Good4.925.6
Sun, 7:00 PM EDT29Good5.525.8
Sun, 8:00 PM EDT32Good6.625.5
Sun, 9:00 PM EDT32Good5.925.4
Sun, 10:00 PM EDT30Good525.8
Sun, 11:00 PM EDT27Good4.325.9
Mon, 12:00 AM EDT25Good3.925.8
Mon, 1:00 AM EDT24Good4.125.1
Mon, 2:00 AM EDT24Good4.424
Mon, 3:00 AM EDT24Good4.622.6
Mon, 4:00 AM EDT26Good4.821.3
Mon, 5:00 AM EDT26Good519.6
Mon, 6:00 AM EDT25Good4.117.8
Mon, 7:00 AM EDT26Good4.816.6
Mon, 8:00 AM EDT27Good5.415.5
Mon, 9:00 AM EDT25Good3.814.8
Mon, 10:00 AM EDT24Good415.1
Mon, 11:00 AM EDT19Good2.716.4
Mon, 12:00 PM EDT17Good2.918.1
Mon, 1:00 PM EDT18Good2.819.9
Mon, 2:00 PM EDT19Good2.621.3
Mon, 3:00 PM EDT20Good3.122.5
Mon, 4:00 PM EDT21Good2.723.8
Mon, 5:00 PM EDT23Good1.725
Mon, 6:00 PM EDT23Good126
Mon, 7:00 PM EDT23Good1.125.8
Mon, 8:00 PM EDT23Good2.825
Mon, 9:00 PM EDT22Good1.824.2
Mon, 10:00 PM EDT20Good222.7
Mon, 11:00 PM EDT19Good2.421
Tue, 12:00 AM EDT18Good2.520
Tue, 1:00 AM EDT17Good318.9
Tue, 2:00 AM EDT17Good3.417.6
Tue, 3:00 AM EDT21Good4.516.9
Tue, 4:00 AM EDT26Good5.716.9
Tue, 5:00 AM EDT29Good5.917.5
Tue, 6:00 AM EDT31Good5.919.1
Tue, 7:00 AM EDT29Good5.221.3
Tue, 8:00 AM EDT28Good4.622.6
Tue, 9:00 AM EDT23Good3.323.9
Tue, 10:00 AM EDT23Good325.6
Tue, 11:00 AM EDT25Good1.427.3
Tue, 12:00 PM EDT26Good128.6
Tue, 1:00 PM EDT27Good0.829.5
Tue, 2:00 PM EDT27Good0.629.1
Tue, 3:00 PM EDT26Good0.528.4
Tue, 4:00 PM EDT26Good0.528
Tue, 5:00 PM EDT25Good0.627.9
Tue, 6:00 PM EDT25Good127.9
Tue, 7:00 PM EDT25Good1.327.3
Tue, 8:00 PM EDT24Good1.526.3
Tue, 9:00 PM EDT21Good1.424
Tue, 10:00 PM EDT20Good2.222.8
Tue, 11:00 PM EDT19Good1.921.1
Wed, 12:00 AM EDT18Good1.719.7
Wed, 1:00 AM EDT17Good1.418.3
Wed, 2:00 AM EDT15Good1.916.4
Wed, 3:00 AM EDT13Good2.114.8
Wed, 4:00 AM EDT12Good2.213.8
Wed, 5:00 AM EDT13Good2.214.2
Wed, 6:00 AM EDT13Good2.714
Wed, 7:00 AM EDT13Good1.714.3
Wed, 8:00 AM EDT13Good1.714.4

Fine particles in micrograms per cubic meter, ozone in parts per billion as an 8-hour average. The index for each hour is EPA’s: the ozone figure is already the 8-hour average the ozone index is defined on, and the particle figure is run through EPA’s NowCast, which is how an hourly PM2.5 concentration becomes an index.

Smoke

NOAA’s analysts have not drawn smoke over Kenmar in satellite imagery today.

NOAA’s model forecasts near-surface smoke peaking at 0.1 µg/m³ around Sun, 3:00 PM EDT.

Smoke on the radar over Kenmar

What this means

Good

Air quality is satisfactory, and air pollution poses little or no risk.

Who is affected
Nobody is expected to be affected.
What to do
It is a good day to be outside.
Index range
0 to 50

Category descriptions are the Environmental Protection Agency’s own.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

Nearby

The nearest towns with a page of their own, closest first.

Weather forecast for KenmarWarnings in Lycoming CountyLive radar over KenmarPennsylvania air quality

Sources

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.