FORECAST SUMMARY:
Monday, January 6th, 2020 through Monday, January 13th, 2020
PM-2.5: 24-hour Fine Particulate concentrations will be mostly Good until early next week when values could range between Good and low Moderate.
FORECAST DISCUSSION:
Quiet weather Monday becomes more active as on and off systems move through the region. The first cold front passes Tuesday bringing in chances for snow; lake effect remains possible through Wednesday. High pressure moves in late Wednesday into early Thursday, but the next system brings precipitation back in the forecast Thursday afternoon/evening. Warmer southerly winds also develop Thursday ahead of the cold front. Precipitation should remain rain in central and southern areas with snow further north. The boundary positions itself south of the state Friday with a low-pressure area developing and riding northeast along the boundary Saturday. The system remains centered to our south/southeast; however, the precipitation extends north of the system into much of lower Michigan Saturday into early Sunday. As temperatures cool Saturday, any liquid precipitation should transition to snow.
As for air quality, no periods of stagnation develop this week and wind speeds are expected to keep the atmosphere well mixed. Generally Good air quality is anticipated, aside from a few early morning hourly readings of low Moderate, mostly in the southeast.
EXTENDED FORECAST:
Extended forecast models show high pressure moving in next Sunday, but the next system moves in from the west Monday. Winds may be weaker with the expected weather pattern which will likely allow for a mix of Good to low-Moderate fine particulate.
Next forecast update: Monday, January 13th, 2020
Updated by: Stephanie M. Hengesbach, Meteorologist