Monday, April 15th, 2019 through Monday, April 22nd, 2019
PM-2.5: 24-hour Fine Particulate concentrations are expected to range from Good to low Moderate through the forecast period.
Sunny conditions Monday turn unsettled Monday night, lasting through the end of the week. Initially the pattern change happens as a boundary becomes stalled over the region, becoming the focus for showers both Tuesday and Wednesday. On Thursday, a low-pressure area pulls the boundary through and storms are a possibility as temperatures warm ahead of it. For Friday and Saturday, a low-pressure area positions itself over the Great Lakes. This system will keep cooler temperatures and scattered showers, possibly mixed with snow, in the forecast.
As for air quality, northwest winds will keep fine particulate readings in the Good range Monday. With a boundary lingering for a few days, fine particulate may increase at a few locations; however, large increases are not expected with levels ranging from middle Good to low Moderate Tuesday through Thursday. Any increase in fine particulate will improve to Good Friday as northeasterly winds develop. Good fine particulate is expected to continue Saturday.
Extended models show the low pulling east Saturday as high pressure moves into the area. Quiet conditions will be in place Easter Sunday, lasting Monday. Northerly winds early Sunday should keep fine particulate from increasing above low Moderate. Southwesterly winds later Sunday and Monday could allow for more widespread low Moderates.