Late-night snow squalls and plummeting temperatures caused untreated roadways in Johnson County to rapidly freeze overnight into Saturday morning.
High temperatures on Friday reached the low 40s, and pavement temperatures across Johnson County ranged from 42 to 48°F around 4 p.m.
By 11 p.m., repeated bursts of heavy snow showers, also known as snow squalls, had impacted the area as air temperatures plummeted into the teens and winds gusted to nearly 40 miles per hour…