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Date: Sunday, August 20 2017 - 15:00 ET
Forecast Valid: Monday, August 21, 2017

Today's Air Quality Conditions: Ozone levels are in the Code Green range across the state this afternoon. Particle pollution levels across the Piedmont are in the low Code Yellow range with Code Green levels being observed elsewhere across the state. For a display of the most recent air quality conditions throughout the remainder of this afternoon, please visit the US EPA's AIRNOW web site.

General Forecast Discussion: Tomorrow, ozone levels should hold in the Code Green range due to reduced solar radiation. Particle pollution levels may remain near the Code Green/Yellow threshold across the state as the air mass will remain moist and stagnant through much of the day tomorrow. However, a maritime onshore flow will gradually develop courtesy of Bermuda high pressure in the Atlantic tomorrow afternoon, which will likely result in particle pollution levels falling from southeast to northwest as the day progresses, with areas in the Coastal Plain possibly seeing 24 hr particle pollution concentrations holding in the Code Green range..

Outlook: An increasingly marine air mass should help to primarily hold ozone levels in the Code Green range. Particle pollution levels should remain near the Code Green/Yellow threshold across the region through Wednesday.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Monday 35-51 Green-Yellow
Tuesday 40-50 Green
Wednesday 40-50 Green

(McLamb - NC Division of Air Quality)