FORECAST SUMMARY: Monday, November 1st, 2021, through Friday, November 5th, 2021
PM-2.5: 24-hour average Fine Particulate readings remain mostly Good through the week.
FORECAST DISCUSSION:
The first snowflakes of the season may be seen this week thanks to cold northwesterly winds triggering lake effect rain and/or snow showers. However, don’t anticipate much accumulation as that should stay to the most prone lake effect areas of the Upper Peninsula and Northern Lower. High pressure moving in from the Plain states ends lake effect precipitation around mid-week as winds decrease and shift to more of southwesterly direction. As the high slides south of the state towards the end of the week, temperatures increase back to more seasonable readings.
The week starts with Good fine particulate thanks to cold northwesterly winds. As winds decrease and switch direction past mid-week, fine particulate will have a greater chance to develop. Hourly levels in the Moderate range early Thursday and again Friday will likely improve resulting in upper Good daily averages. The greatest chance for low Moderate fine particulate later in the week will be in the southeastern portion of the state. We will keep an eye on levels and update to a Moderate forecast once we notice levels increasing.
While fine particulate higher than Moderate is not anticipated through next Monday, we will update the forecast Friday to detail how widespread Moderate readings may be through the weekend and early next week.
EXTENDED FORECAST:
Extended models show moderating temperatures and southerly winds into early next week which may result in Moderate fine particulate.
Next Forecast update: Friday, November 5th, 2021