West Michigan Clean Air Coalition

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2/27/2023 Forecast Update

FORECAST SUMMARY: Monday, February 27, 2023, through Monday, March 6, 2023

PM-2.5: 24-hour average Fine Particulate concentrations are expected to be mostly Good with occasional Low Moderate late in the weekend.

FORECAST DISCUSSION:

The forecast week start off messy with another winter system moving through the Midwest.  A warm front to the south causes warm, moist air to override colder Michigan air.  That scenario will yield rain in Southern Michigan, mixed precipitation in the middle, and snow to the north under easterly winds.  While messy, it should not last as long as last week’s winter storm and Air Quality is currently generally Good.

This system should be out of the picture early Tuesday replaced with westerly winds and continued Good Air Quality.  A weaker system is expected to move east into the area late Tuesday night bringing a light accumulation of rain in the south and snow in the middle and north.  Northeasterly winds will follow and more Good Air Quality.

The main event for the forecast period will come in the form of a strong system which will move into the area during Friday.  There is the potential for a significant snowstorm although the potential precipitation type and amount will be determined by the track of the storm.  Currently, the computer models are confining precipitation to the southern half of the state.

If any Low Moderates occur during this forecast period, it will likely occur later in the weekend when wind speeds are low and some stagnation could occur.  But for the most part, Good Air Quality will rule this forecast period.

EXTENDED FORECAST:

Air Quality should be mostly Good to begin the next work week.

Next Forecast update: Monday, March 6, 2023