Saturday's air quality will be worse than we've seen for a few days. After Friday evening's PM2.5 accumulation, we should see the pollution levels decrease a bit overnight. But by mid-morning, PM2.5 levels should be on the rise and continue increasing throughout the day. We should certainly make it to Unhealthy and possibly to Very Unhealthy by the end of the day.
UPDATE - Our prediction with overlay of actual readings:
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