12/28/2020 Forecast Update
FORECAST SUMMARY:
Monday, December 28th, 2020 through Monday, January 4th, 2021
PM-2.5: 24-hour average Fine Particulate concentrations will be a mix of Good and Moderate during through the forecast period.
FORECAST DISCUSSION:
An exiting cold front, Monday morning, will provide cooler temperatures and Good Air Quality early in the week. A series of frontal passages, throughout the forecast period, should keep the atmosphere well mixed.
Tuesday should be a dry and calm day with continued Good Air Quality. During Wednesday however, winds will transcend from northeast to southeast to southwest before the next cold passage during the afternoon.
Easterly winds set up later Thursday, thanks to a low pressure system that comes up the Mississippi Valley on Friday, and slides northeast through Southeast Michigan early Saturday. Northwest winds behind that system will keep the atmosphere mixed and clean into Sunday in advance of the next system during the Tuesday time frame.
With all the turnovers in the atmosphere, conditions should remain mostly Good with an occasional Moderate in the more urban areas.
EXTENDED FORECAST:
Air Quality should again be mostly Good to occasional Moderator going into next week.