FORECAST SUMMARY:Thursday November 14th through Monday November 18th 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 concentrations are expected to be in the Good to low-Moderate range.

FORECAST DISCUSSION:

Most of us Michiganders wake up to damp and dreary skies as a Low-pressure system is moving to the east just to the south of us near the Ohio border. This pressure system brought in rain overnight with some areas seeing rain taper off with others seeing a persistent rain. By tomorrow, Friday morning, the system will be well off to the east, but lingering rain showers may persist especially along the Lake Michigan shoreline due to lake enhanced forcing causing pop up rain showers, much alike lake effect snow. By Friday afternoon the majority of Michigan is dry but overcast skies will last essentially throughout the entire weekend, even though a High-pressure system moves in. Even though it will be cloudy, the High-pressure system will shift winds to more southerly flow which will bring in warmer air with some areas approaching the mid-50s on Saturday and Sunday. Another pressure system moves into the region early Monday which will shift winds back to more northerly flow, thus cooling us down into the upper 40s.

PM-2.5 concentrations are expected to be in the Good to low-Moderate range with most of the areas seeing Moderate concentrations being more populated areas like Grand Rapids and Detroit. Once winds shift to southerly flow, this may bring in more PM-2.5 concentrations but nothing major, although slightly noticeable on monitors throughout Saturday and Sunday. Overall, Good to low-Moderate averages are expected.

  EXTENDED FORECAST:

Next week will see numerous pressure systems influencing our weather with mid-to-late next week possibly seeing snowflakes across the state. With the multiple rounds of pressure systems, air quality is expected to be in the Good range.

Next Forecast Update: Monday, November 18, 2024