After the National Weather Service advised that travel may be very difficult to impossible, the Arizona Department of Transportation says it will close sections of Interstates 40 and 17. 

As parts of the state brace for a winter weather starting late Thursday, ADOT and the Arizona Department of Public Safety have determined that the safest course of action is to close highways with blizzard conditions until the snow can let up and crews can plow.

According to a statement, ADOT says the affected areas could include I-40 between U.S. 93 and Winslow, as well as I-17 between Flagstaff and State Route 179 near Sedona.