Monday, February 11th, 2019 through Friday, February 15th, 2019
PM-2.5: 24-hour Fine Particulate concentrations are expected to be mostly Good through the forecast period.
A developing weather system will pass the Great Lakes region early Tuesday through Wednesday afternoon. Warmer temperatures in southern parts of the state will produce freezing rain along with snow, but only snow is expected further north. As the system pulls away, precipitation changes to all snow and chances for snow last through Wednesday morning. As for air quality, lighter winds early Monday turn easterly during the day. A few low Moderate fine particulate readings in the southeast are possible Monday, otherwise, stronger winds with the storm system should keep Good air quality conditions through Wednesday.
High pressure builds in briefly late Wednesday/early Thursday before another storm system moves through Thursday into Friday. Fine particulate readings are expected to remain Good Thursday and a stronger northerly wind as the system passes will keep Good air quality in place Friday.
Extended models show high pressure settling over the state for the weekend, into early next week. Temperatures should remain low enough to prevent a significant snow melt; however, lighter winds may help produce Moderate fine particulate for a day or two. This forecast will be updated Friday to detail expected air quality conditions through the Presidents Day holiday.