FORECAST SUMMARY:

Friday, June 12th, 2020 through Monday, June 15th, 2020

OZONE: 8-Hour average Ozone concentrations will generally be Good with some Moderates possible Monday.

PM-2.5: 24-hour average Fine Particulate concentrations will range from Good to low Moderate by Monday.

FORECAST DISCUSSION:

Scattered showers are a possibility Friday as a weak boundary sinks through the state; however, most locations remain dry. For the rest of the week/weekend, cool high pressure will be in place with plenty of sunshine but expect below normal temperatures.

As for air quality, cool surface and upper level temperatures coupled with a northerly, then easterly, component to the wind should keep both ozone and fine particulate generally Good through Sunday.

By Monday, high pressure slides east, and winds change to more of a southeasterly direction. Temperatures rebound to normal levels, but I feel cooler upper levels temperatures will hamper a significant increase in ozone, especially coming off a low background from the weekend. Ozone and fine particulate should both be in the upper Good to low Moderate range Monday.

EXTENDED FORECAST:

Extended forecast models show increasing temperatures into mid-week with southwesterly winds developing by Tuesday. Pollution levels past Monday likely increase into the Moderate range, but this will be detailed in the Monday forecast update.

Forecast update by Meteorologist Stephanie M. Hengesbach June 12th, 2020
Next forecast update: Monday, June 15th, 2020