Friday, February 15th, 2019 through Tuesday, February 19th, 2019
PM-2.5: 24-hour Fine Particulate concentrations are expected to be generally Good through most of the forecast period, Moderates may return by Tuesday.
A cold front pushing through Friday will reinforce cool temperatures over the state. Some morning hourly fine particulate levels may reach Moderate in the southeastern portion of the state, but readings improve as the day progresses. Daily fine particulate averages of Good are expected state-wide. Quiet conditions on Saturday will be a nice break of the active weather experienced recently. High pressure settles in and a northerly component to the wind should keep fine particulate mostly Good. The high slides east Sunday as a storm system moves south of the state. Easterly winds develop on the north side of this storm and there are chances for snow generally in southern areas. Good fine particulate levels are expected to continue through Sunday.
Quiet conditions will be in place for the Presidents Day holiday and continuing into Tuesday. Northeasterly winds on Monday should keep fine particulate Good. Winds weaken Tuesday as high pressure moves overhead. A weak system moving through the Upper Peninsula may trigger some light snow, otherwise conditions remain dry. The weaker winds could cause some Moderate fine particulate with most Moderates confined to southern portions of the state.
Extended models show a storm system developing and moving just south of Michigan during mid-week. The storm has the potential to bring accumulating snow, especially to southern portions of the state. As for air quality, weaker winds on the onset could keep some Moderate fine particulate around for Wednesday.