It's clear across the country and there's a big daily temperature difference...Some Midwest Air Quality 'Bad'

The weather will continue to be clear across the country over the weekend, but air quality is likely to be bad in some parts of the Midwest.

The National Institute of Environmental Research said that amid the influx of fine dust from abroad, the atmosphere stabilizes and stagnates in the high-pressure area, and there will be places where the concentration of fine dust becomes "bad" in the Midwest.

However, he added that the amount of dust coming in is unlikely to be large enough to worry about damage.