FORECAST SUMMARY: Monday, October 6, 2025 through Friday, October 10, 2025
OZONE: 8-hour average Ozone concentrations are expected to be mostly Good (AQI Green).
PM-2.5: 24-hour average Fine Particulate concentrations are expected to be Good (AQI Green) to scattered Low Moderate (AQI Yellow).
FORECAST DISCUSSION
In the spirit of “All Good Things Must Come to an End”, Monday will be the last day of the extended late summer weather we have been enjoying. Current temperatures, running 15-20 degrees above normal, will come to an end as an advancing cold front migrates through the region Monday night and Tuesday.
This front will collide with deep moisture streaming up from the Gulf. Atmospheric instability is limited, but models are showing some convection which could contain brief heavy downpours and gusty winds. Heaviest precipitation looks to be in a line stretching from Holland to the northern Thumb area. Rainfall amounts in this zone will likely range from three-quarters inch to an inch. Other areas should expect about half an inch of rain.
High pressure will move in Tuesday evening with dry, northerly flow and more seasonable temperatures. With clear skies and dry conditions, we can expect high temperatures in the mid-60’s and low temperatures in the upper 30’s and low 40’s. Remote low-lying areas could see some light frost. These conditions should prevail through the remainder of the forecast period.
In terms of Air Quality, I am not anticipating any issues during this period and AQI levels should range between mostly Good to scattered Low Moderate.
EXTENDED FORECAST:
Air Quality is expected to remain Good to Low Moderate entering the upcoming weekend.