The Pima County Road hotline advises drivers to use caution on roadways, as there are a few icy patches out there.
One of the first roads that could close today is Mt. Lemmon Highway, when the snow starts to fall.
The mountain is expected to be hit with a winter storm in the next 24 hours.
It isn't just here that road conditions are being monitored. City and county crews are keeping an eye out on all roads across the city, especially bridges. They could be spraying down those bridges as Southern Arizona hits those freezing temperatures.
If it turns to slush on the roads, city and county officials could use sand instead.
Tucson News Now will be tracking the winter storm closely.
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