Snow accumulations between 6 and 12 inches beginning Friday night, Jan. 6, near Mt. Shasta have prompted the National Weather Service to issue a Winter Storm Watch.

Precipitation is likely to arrive as snow at most locations in northern California and eventually change to freezing rain, then rain, according to NWS. “The combination of new snow and freezing rain on existing snowpack and very cold surfaces, including roads, may make travel very difficult late Friday into Saturday.”

Locations listed in the Storm Watch include Mt. Shasta City, McCloud, Tennant, and all area roads including Interstate 5 and Highway 89.

NWS also issued a Hydrologic Outlook that mentions the possibility of flooding due to heavy rain and snow melt in Siskiyou and Modoc counties in California and Coos, Curry, Douglas, Jackson, and Josephine counties in Oregon.

“An initial round of heavy rainfall this weekend will saturate low elevation snow pack leading to increased run-off,” according to NWS. “A second round of heavy rain Tuesday through Thursday will lead to another period of substantial run-off next week.”