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Date: Monday, February 20, 2017 - 15:00 ET

Forecast Valid: Tuesday, February 21, 2017

Today's Air Quality Conditions: Particle pollution has dipped into the Code Green range in most of the state due to daytime mixing. Smoke from a wildfire near Cold Mountain may be bringing Code Yellow air quality to parts of the Asheville area. 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 will slide by to our north for tomorrow while an upper disturbance approaches the Mountains late. Winds will tun out of the east and transport cooler air into the state. Clouds will increase, with mostly cloudy skies in the west and partial sun in the east. Particle pollution will hover in the low Code Yellow range, mainly in the western half of the state. Some higher particle pollution is possible in the Asheville area due to smoke. Clean air transport from off the Atlantic will bring air quality down into the Code Green range east of I-95.

Outlook: An upper disturbance will pass over the state on Wednesday with clouds and scattered showers. Surface low pressure to our south will enhance the easterly flow and lead to better rain coverage in the western half of the state as the flow lifts over the higher terrain. The rain and clean easterly flow should bring particle pollution down into the Code Green range state-wide. A warm front developing out ahead of low pressure in the central US may bring some scattered light showers for Thursday. Winds will be light and broken to overcast skies will be present, which will cut down on mixing. Particle pollution may rebound into the Code Yellow range in portions of the state on Thursday.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Tuesday 40-75 Green-Yellow
Wednesday 35-50 Green
Thursday 35-51 Green-Yellow

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)