Air Quality Portal
Forecast Discussion
The North Carolina Division of Air Quality issues forecasts for fine particulate matter year-round and ozone from March through October. Forecasts and discussions are updated each afternoon for the next three days, and are sometimes updated in the morning to reflect the latest ambient conditions.
This forecast was issued on Sunday, April 27, 2025 at 1:10 pm.
This is an old forecast that is no longer valid.
Today's Air Quality Conditions
Ozone levels have risen into the Code Yellow range in portions of the central mountain region but are holding in the Code Green range elsewhere thus far today. Daily average PM2.5 levels are Code Green statewide today.
For a display of the most recent Air Quality Index (AQI) conditions throughout the day, visit the Ambient Information Reporter (AIR) tool.
General Forecast Discussion
Surface high pressure centered over the Mid-Atlantic states will drift eastward and off the Carolina coast by Monday evening resulting in very light veering winds across the state. Both ozone and fine particulate concentrations will gradually rise, possibly into the moderate range in portions of the interior.
Outlook
Another shortwave and surface low will pass over the Great Lakes region on Tuesday but the surface high lingering over the southeast will prevent the associated cold front from impacting North Carolina. With a warm front lifting through ahead of that system, ozone and fine particulates will likely stay elevated into the moderate range and continue through Wednesday as weak high pressure remains in control.
Daily PM2.5 values > 9.0 μg/m³, or in the Code Yellow range or higher, may contribute to an exceedance of the EPA's annual PM2.5 standard.
Extended Air Quality Outlook
The forecast Air Quality Index value for each pollutant represents the highest value expected within each county, so some areas and monitors may see lower values. We use the best information and techniques available to ensure the quality and accuracy of the forecasts we provide to the public. Note that ranges do not include the nine-county Triad region, which is covered by the Forsyth County Office of Environmental Assistance and Protection.
Forecast Day
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Max AQI Range
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(Elevation > 4,000 feet)