California air quality

Patton Village, California Air Quality

Lassen County40.141, -120.155

The nearest monitor to Patton Village, at Portola, 28 miles away, measured an index of 11 at Fri, 11:00 PM PDT, which is Good for fine particles (PM2.5). Northern Sierra AQMD forecasts Good for Portola today and Good tomorrow.

Measured now
11 · Good
Today
17 · Good
Tomorrow
22 · Good
Pollutant
PM2.5

Fine particles on the map

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

Forecast fine particulate matter from NOAA’s National Air Quality Forecast Capability over Patton Village, California 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 Patton Village right now. All California warnings.

Now

Good

Nearest monitor
Portola, 28 miles away (site 060631010)
Index measured
11 · Good
Measured at
Fri, 11:00 PM PDT
Reporting area
Portola, CA, 28 miles away
Reported by
Northern Sierra AQMD
Area index
11 · Good

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

Today and tomorrow

Northern Sierra AQMD's own forecast for Portola, written by a forecaster rather than read off a model.

DayCategoryIndexPollutant
Friday, September 25Good22PM2.5
TodayGood17PM2.5
TomorrowGood22PM2.5
Monday, September 28Good33PM2.5
Tuesday, September 29Good39PM2.5
Wednesday, September 30Good39PM2.5

The forecaster’s discussion

Written by Northern Sierra AQMD for Portola and filed with AirNow.

Friday, September 25: As an upper-level trough of low pressure passes to the north, gusty southwesterly surface winds will develop in Portola during the afternoon, effectively dispersing pollutants and leading to Good AQI levels. Saturday, September 26 and Sunday, September 27: Moderate southwesterly to southerly surface winds will redevelop each afternoon as the next trough of low pressure strengthens along the northern California coast. These winds will effectively disperse pollutants, yielding continued Good AQI levels on both days. Monday, light and variable winds will inhibit pollutant dispersion in Portola as the low-pressure system departs to the south. However, cool aloft temperatures will continue to support mixing, resulting in another day of Good AQI levels. Tuesday and Wednesday, a building ridge of high pressure aloft will decrease atmospheric mixing over the northern Sierra. In addition, calm winds and temperature inversions will allow pollutants to accumulate in Portola each morning and evening. However, light to moderate easterly winds will aid dispersion each afternoon as a surface ridge of high pressure develops to the north, resulting in continued Good AQI levels on both days.

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 37, Good, around Sun, 9:00 PM PDT, from the run issued Fri, 8:00 PM PDT. This is a model, not a measurement.

HourIndexCategoryPM2.5Ozone
Sat, 12:00 AM PDT33Good1.736.1
Sat, 1:00 AM PDT31Good2.334.8
Sat, 2:00 AM PDT31Good2.133.1
Sat, 3:00 AM PDT29Good231.1
Sat, 4:00 AM PDT27Good1.929.4
Sat, 5:00 AM PDT25Good1.527.7
Sat, 6:00 AM PDT23Good2.525.8
Sat, 7:00 AM PDT22Good2.724.2
Sat, 8:00 AM PDT21Good2.423.1
Sat, 9:00 AM PDT20Good3.122.5
Sat, 10:00 AM PDT20Good3.922.9
Sat, 11:00 AM PDT23Good5.123.7
Sat, 12:00 PM PDT25Good4.925
Sat, 1:00 PM PDT25Good4.526.7
Sat, 2:00 PM PDT26Good2.828.8
Sat, 3:00 PM PDT29Good2.531.1
Sat, 4:00 PM PDT31Good1.933.3
Sat, 5:00 PM PDT32Good1.335.1
Sat, 6:00 PM PDT33Good1.636.3
Sat, 7:00 PM PDT34Good1.937.2
Sat, 8:00 PM PDT34Good2.337.6
Sat, 9:00 PM PDT34Good2.537.7
Sat, 10:00 PM PDT34Good2.337.4
Sat, 11:00 PM PDT33Good2.636.8
Sun, 12:00 AM PDT33Good2.836
Sun, 1:00 AM PDT32Good3.335.3
Sun, 2:00 AM PDT31Good3.134.2
Sun, 3:00 AM PDT31Good333
Sun, 4:00 AM PDT29Good3.331.7
Sun, 5:00 AM PDT28Good3.230.2
Sun, 6:00 AM PDT26Good3.628.5
Sun, 7:00 AM PDT25Good427.2
Sun, 8:00 AM PDT23Good4.325.9
Sun, 9:00 AM PDT25Good5.125.1
Sun, 10:00 AM PDT28Good5.525.2
Sun, 11:00 AM PDT28Good525.7
Sun, 12:00 PM PDT26Good4.626.6
Sun, 1:00 PM PDT25Good3.428
Sun, 2:00 PM PDT27Good2.429.9
Sun, 3:00 PM PDT30Good2.532
Sun, 4:00 PM PDT31Good234.4
Sun, 5:00 PM PDT33Good1.536.5
Sun, 6:00 PM PDT35Good1.338.2
Sun, 7:00 PM PDT36Good139.4
Sun, 8:00 PM PDT36Good139.9
Sun, 9:00 PM PDT37Good0.940.3
Sun, 10:00 PM PDT37Good0.540.5
Sun, 11:00 PM PDT37Good0.440.3
Mon, 12:00 AM PDT36Good0.139.6
Mon, 1:00 AM PDT35Good0.638.5
Mon, 2:00 AM PDT34Good0.737.1
Mon, 3:00 AM PDT32Good135.7
Mon, 4:00 AM PDT31Good0.834.5
Mon, 5:00 AM PDT31Good0.733.1

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 Patton Village in satellite imagery today.

NOAA’s model forecasts near-surface smoke peaking at 0.9 µg/m³ around Sun, 11:00 AM PDT.

Smoke on the radar over Patton Village

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 Patton VillageWarnings in Lassen CountyLive radar over Patton VillageCalifornia 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.