A large cold front from the Gulf of Alaska is expected to move into the region Wednesday night, bringing 20-degree temperature drops and snow with it, meteorologists said.

National Weather Service officials said precipitation is expected through early Thursday morning, with snow levels dropping to 3,000 feet. Temperatures are expected to go from highs in the upper 60s to the mid 40s Thursday and Friday in Jackson County.

Weather officials added that the snowfall will most likely affect road conditions in areas of higher elevation, including the Siskiyou Pass on Interstate 5, highways 230 and 138 near Diamond Lake, and Highway 140's stretch over the Cascades.

"While some of the finer details will be finalized over the next few days, there is moderate to high confidence in the timing and colder air associated with the system," a NWS statement reads.

The front is expected to have a wide range, hitting Siskiyou, Modoc, Curry, Josephine, Klamath, Lake and Jackson counties.

--Ryan Pfeil