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, May 18, 2025 at 1:53 pm.
This forecast is currently valid.
Today's Air Quality Conditions
Ozone levels have risen into the Code Yellow range northeast of both the Charlotte and Fayetteville metro areas this afternoon. Current daily average fine particulate levels are in the Code Green range statewide.
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
A quasi-stationary frontal boundary will linger over the region through Tuesday, wavering a bit north and south through the period. Fine particulate levels will likely rise on Monday as the pressure gradient weakens between the outgoing and incoming systems. However, a slight increase in moisture and cloud cover should keep ozone down in the Green range. On Tuesday, more of an onshore wind component should help lower fine particulate levels, especially in the northeastern part of the state.
Outlook
A broad upper-level trough over the northeastern US and associated surface low will approach from the west on Wednesday. Some showers are possible ahead of the cold front which should clear the state by early Thursday. Ozone and fine particulate levels should hold steady in the Code Green range statewide.
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
View Maps
Max AQI Range
Category Range
Download KML
(Elevation > 4,000 feet)