FORECAST SUMMARY:
Monday, April 1st, 2019 through Monday, April 8th, 2019
PM-2.5: 24-hour Fine Particulate concentrations are expected to range from Good to low Moderate through much of the week. More widespread Moderates are possible during the weekend, before improving to Good early next week.
FORECAST DISCUSSION:
A system moving through brings chances for precipitation to mostly northern portions of the state Monday afternoon until early Tuesday. The system remains north of the state Wednesday; therefore, light precipitation could linger in the Upper Peninsula. Precipitation type will be dependent on temperatures as readings move above and below freezing during the period. Fine particulate during this time is expected to range from middle Good to low Moderate across the state.
The next weather system approaches from the south Thursday. Forecast computer models differ on how far north the system gets; however, it looks like precipitation comes in the forecast starting Thursday morning in the south, tracking north as the day progresses. Southerly winds are in place ahead of the system and behind it, there does not look to be a good northwest flow but instead, the flow is weak, and temperatures are expected to increase. Fine particulate Thursday and Friday will likely remain between middle Good and low Moderate. As weak high pressure moves in Saturday, more widespread Moderate fine particulate are likely; this is especially true for northern portions of the state where snow melt from the existing snowpack is likely.
EXTENDED FORECAST:
Extended models show high pressure dominating during most of the weekend with warmer temperatures in place. The next storm system is forecast to move through Sunday into Monday. Moderate fine particulate will persist Sunday, but readings should improve Monday as the storm moves through.