09/13/2019 Forecast Update


Friday, September 13th, 2019 through Monday, September 16th, 2019

Ozone: 8-hour Ozone concentrations will be mostly Good.

PM-2.5: 24-hour Fine Particulate concentrations will range between Good and low Moderate.


Showers and storms are in the forecast Friday as a cold front passes west to east across the state. High pressure builds on Saturday, but a weak system Sunday will bring small chances for precipitation. Conditions dry out Monday with highs in the 70s. Forecast models are showing a warm-up as next week progresses.

As for air quality, clouds and precipitation will keep ozone Good Friday. Gusty west winds Saturday behind the front will allow Good ozone to continue. The Good trend for ozone should linger early next week as northerly winds at the surface and upper levels arrive following the Sunday disturbance.

Without a prolonged period of stagnation through early next week fine particulate should remain mostly Good. The only exception would be a few low-Moderates possible in the southeast on Friday, then again Sunday and Monday.


Extended models show dry conditions through mid-week next week with temperatures increasing as ridging builds over the region. Sunshine and warmer temps could allow for some Moderate pollution to develop.

Next forecast update: Monday, September 16th, 2019