Another round of winter weather will move into the region late Thursday and into Friday for Metro Detroit. 4Warn Meteorologist Bryan Schuerman talks about why we could see another round of school closings.

What do the Marginal, Slight, Enhanced, Moderate, and High risk categories for severe weather mean?

DETROIT Its a hot holiday weekend in Michigan, but air quality for much of the state is at a moderate level of concern. The U.S. AQI (Air Quality Index) is how the EPA reports air quality. The higher the AQI value, the greater the level of air pollution and the greater the health concern. For example, an AQI value of 50 or below represents good air quality, while an AQI value over 300 represents hazardous air quality. Air quality is acceptable.