(Photo by Jude Joffe-Block/KJZZ)

Snow in Flagstaff Dec. 31, 2014.

Travelers headed to northern Arizona this holiday weekend should be on the lookout for a potential storm around Flagstaff.

The National Weather Service says a low pressure system is bringing a good chance for rain and snow — with Sunday the likeliest to snow.

The Weather Service says drivers should check on the forecast often and be aware the northern part of state will likely have winter driving conditions Sunday and Monday.

The Associated Press contributed to this report.