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 Wednesday, May 21, 2025 at 1:58 pm.
This forecast is currently valid.
Today's Air Quality Conditions
Current hourly ozone readings are in Code Green range statewide. Daily averages for fine particulates are in Code Yellow range across the southern Piedmont and into the southern Coastal Plain. Otherwise, averages are in Code Green range.
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 stalled low pressure system across the Northeast US will continue to bring westerly/northwesterly winds across the state Thursday. This flow will keep advecting dry and clean air into the state. Also, favorable afternoon mixing and a stiff wind will also help with dispersion. Air quality is expected to be in Code Green range statewide for fine particulate and ozone averages.
Outlook
West/northwest winds will continue on Friday as low pressure continues to linger across the Northeast US. A weak cold front will pass through the state early, which will bring even drier and cleaner air into the state. On Saturday, weak high pressure is expected to settle over the state. With continued clean air advecting into the state and favorable dispersion, both days should continue with Code Green air quality statewide, although Saturday will likely tick slightly higher.
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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