Forecast Discussion

Date: Wednesday, September 30, 2020

Forecast Valid: Thursday, October 1, 2020

Today's Air Quality Conditions: Air quality levels 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: An H5 trough and surface front will approach the region on Thursday. With moisture values low, there is no appreciable precipitation expected. However, some clouds are expected along with the frontal passage. With low incoming background levels upwind and a clean air mass in place, air quality should maintain at Code Green levels.

Outlook: Cooler autumn weather will settle in towards the end of the week following the frontal passage. High pressure at the surface will begin to build into the region on Friday as the H5 trough begins to weaken. Skies will begin to clear out and are expected to become mostly sunny, which will allow for some photochemistry. However, cooler temperatures will help to temper the formation of ozone and air quality levels are expected to maintain in the Code Green range through Saturday.

Extended Air Quality Outlook
Forecast Day
AQI Range
Category Range
Thursday 35-40 Green
Friday 35 Green
Saturday 35 Green

The forecast Air Quality Index value for each pollutant represents the highest value expected within the forecast region, 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.

(Wylie - NC Division of Air Quality)