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Date: Wednesday, October 18, 2017 - 15:00 ET
Forecast Valid: Thursday, October 19, 2017

Today's Air Quality Conditions: Ozone and particle pollution readings are in the Code Green range statewide this afternoon. 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: Clear, dry and cool weather will continue statewide tomorrow as high pressure remains centered over the Carolinas. Ozone and particle pollution readings in the Code Green range are expected statewide tomorrow.

Outlook: High pressure will remain overhead through the end of the week, allowing the air mass to gradually become stagnant. On Friday, the residual air mass should remain clean so air quality levels will likely hold in the Code Green range. By Saturday, particle pollution levels may edge upward towards the Code Green/Yellow threshold, but ozone levels will likely remain in the Code Green range as the late October sun will not provide sufficient solar insolation to produce significant ozone levels across the state.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Thursday 35-45 Green
Friday 40-50 Green
Saturiday 40-55 Green-Yellow

(McLamb- NC Division of Air Quality)


Date: Tuesday, October 17, 2017 - 15:00 ET
Forecast Valid: Wednesday, October 18, 2017

Today's Air Quality Conditions: Ozone and particle pollution readings are in the Code Green range statewide this afternoon. 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: Clear, dry and cool weather is expected statewide tomorrow as high pressure remains centered over the Carolinas. Ozone and particle pollution readings in the Code Green range are expected statewide tomorrow.

Outlook: High pressure will remain in place through the rest of the week, keeping dry and cool weather in place with generally light and variable winds. Ozone and particle pollution readings may build into the lower Code Yellow range in the Charlotte and Triangle regions with Code Yellow particle pollution readings also possible in the Hickory region. Ozone readings in the Code Yellow range will remain in place Friday in the Charlotte and Triangle regions, with Code Yellow particle pollution conditions also possible in the Asheville and Hickory regions.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Wednesday 35-43 Green
Thursday 40-55 Green-Yellow
Friday 40-60 Green-Yellow

(Tardif - NC Division of Air Quality)