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Date: May , 2017 - 15:00 ET

Forecast Valid: May , 2017

Today's Air Quality Conditions: Ozone and particle pollution are in the Code Green range 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: High pressure ridging will shift eastward tonight and a weak cold front will push into the Mountains during the afternoon, then into central portions of the state tomorrow night. Clouds will be on the increase with scattered afternoon/evening showers and thunderstorms in the western half of the state. A south to southwest breeze will keep the air moving while increasing clouds limit ozone formation. Air quality will remain in the Code Green range.

Outlook: The cold front will wash out over the area Thursday night, and ridging will build over the area on Friday on through the weekend. A Bermuda high pressure will be located offshore during the extended range and will pump warm and moist air into the southeast US. The air flow will originate from the Atlantic and will be very clean. Air quality is expected to remain in the Code Green or Good range on Friday and throughout the weekend.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Thursday 40-47 Green
Friday 38-45 Green
Saturday 38-45 Green

Note: Ozone is forecast from April 1 to October 31. During the cool season ozone is typically in the Code Green range.

(Witcraft - NC Division of Air Quality)


Date: Tuesday, April 25, 2017 - 15:00 ET

Forecast Valid: Wednesday, April 26, 2017

Today's Air Quality Conditions: Air quality is in the Code Green or Good category in all parts of 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: The low pressure that brought heavy rains over the past couple of days will pull away from North Carolina tonight. A weak ridge of high pressure will build over the area tomorrow. It will be sunny and warm with light winds. Ozone will make a run at the Code Yellow range, but should fall short in most areas. Particle pollution will rise slightly but will easily remain in the Code Green range.

Outlook: A weak cold front will approach the Mountains during Thursday and gradually dissipate Thursday night into Friday. The front will bring and increase in clouds and a few widely scattered showers, as well as cause winds to increase out of the southwest. The higher winds speeds and partial cloud cover will help keep air quality in the Code Green range. Ridging will build over the area later Friday and into the weekend. The Friday to Sunday period will be warm and humid with a slight chance of afternoon and evening showers/thunderstorms. The high pressure will be centered near Bermuda and will cause our air flow to have a clean onshore component. Air quality is expected to remain in the Code Green range into the weekend.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Wednesday 40-47 Green
Thursday 38-45 Green
Friday 38-45 Green

Note: Ozone is forecast from April 1 to October 31. During the cool season ozone is typically in the Code Green range.

(Witcraft - NC Division of Air Quality)