FORECAST SUMMARY: Monday, December 9, 2024, through, Friday, December 13, 2024

OZONE:

November marks the end of the 2024 ozone season. The 2025 ozone season will begin on March 1st.

 PM-2.5:

PM-2.5: 24-hour daily average Fine Particulate concentrations will average between Good (Green AQI) and Moderate (Yellow AQI).

FORECAST DISCUSSION:

The warmest temperatures this week will be seen today, Monday, under a southerly wind flow ahead of the next weather system. Increased moisture and a chance for light precipitation exist; however, clearing may happen in western locations as the current weather system pulls away from the region. Winter weather makes a return as the week progresses with cooler air moving in behind a Tuesday frontal boundary, and snow also makes a return. Lake effect snow in a northwesterly wind pattern comes into the forecast Tuesday through mid-week. High pressure is expected to move in for a short time Friday, before another system moves across the state Saturday.

 As for air quality, increased moisture Monday could allow for low-Moderate fine particulate levels, especially across the southern portion of the state. Fine particulate concentrations in the low-Moderate range could linger into Tuesday in the southeast; otherwise, cool northwesterly winds should keep fine particulate in the Good range past mid-week. High pressure and weaker winds Friday could allow for a return to low-Moderate pollution levels.

  EXTENDED FORECAST:

Extended forecast models show a system moving through on Saturday, which brings precipitation back into the forecast. Fine particulate levels during the coming weekend will likely range from upper Good to low Moderate.

Next Forecast Update: Friday December 13th, 2024