ST. LOUIS — Fog formed overnight and thickened during the early morning hours Saturday.
Visibility has varied, some areas have been reduced to 1/4 to 0 miles.
In Missouri, Farmington and Perryville have held steady at 0 miles of visibility.
In Illinois, Flora, Sparta and Belleville reports have ranged from 0 to 1/4.
Check out our gallery of foggy shots from our camera network. If you look closely, the view from 100 Above the Park shows a few Clayton buildings poking up from the fog.
Now that the sun is up and temperatures are warming, fog is mixing out. Fog will lift by midday.
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