Wet roads without a drop of rain?

The roads are sweating

KANSAS CITY, Mo. — We have not had a drop of rain, but the roads have been damp and even downright wet.

Tonight, paved surfaces will likely become quite wet again with the chance of a just a sprinkle.

So what is going on?

Warmer air with moisture is moving north from the Gulf of Mexico, increasing the humidity to more than 90 percent, and this is creates something interesting.  

When this humid air moves over the cold, salt covered pavement, the moisture will condense, causing the roads to sort of sweat — making it look like it rained.

The water and salt combination on the roads can make them slick in spots, splatter windshields and ruin a car wash, so drive carefully. 

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