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Here's why you shouldn't drive on I-17 between Phoenix and Flagstaff Thursday and Friday

Snow will make travel impossible on some parts of Interstate 17, the National Weather Service says.

PHOENIX — Arizona is bracing for a potentially historic winter storm that will start late Wednesday and won't let up until Friday afternoon. 

Some parts of the High Country will receive feet of snow, making travel conditions difficult to impossible Thursday and Friday, the National Weather Service says.

Significant traffic delays along the interstate are extremely likely. Officials are encouraging people to delay travel plans to avoid a potentially dangerous situation. 

RELATED: Don't drive through Arizona snow without these items in your car

NWS made an infographic that predicts the amount of snow that will fall along I-17 between Wednesday and Friday. 

There will be snow starting just north of Black Canyon City. Cordes Lakes will receive anywhere from 7 to 14 inches of snow and near Highway 169 could reach up to 20 inches of snow. 

RELATED: List: Cancellations, school closures due to the Arizona winter storm

Due to elevation, Camp Verde will receive less snow but near Highway 179, another 20 inches is expected. 

The heaviest snowfall will be in the Munds Park area with up to nearly three feet of snow. Flagstaff is expected to accumulate up to two feet of snow. Remember that you should not shovel snow out of your driveway onto the roadway -- under Arizona law, you could be held liable if the snow pile causes a crash.

Check out the NWS infographic below. Remember, if you must travel, to pack water, snacks, a cell phone charger, winter coats and warm blankets. For more information on how to pack an emergency kit, click here.

6:00 AM MST- Well folks, the storm is on its way and will begin for many of you late tonight. Winter Storm Watches have been upgraded to warnings across all of northern Arizona. Here is a look at...

MORE: Arizona braces for what could be the biggest winter storm of the season