Josh Rubenstein's Weather Forecast (Dec. 4)

STUDIO CITY (CBSLA.com) — As promised, some of the coldest air of the year is descending into Southern California. There's a dry cold front that moved through overnight, picking up some light showers in the San Gabriel Valley last night, but that's about it.

The skies will continue to clear as the front pushes to the east. There is a broad trough in place along the West Coast that has literally opened the door to polar air, which will dominate our forecast for the next 4 or 5 days.

The winds will relax through the day. The lack of wind combined with clear skies will help to bring our temperatures down below freezing in many valleys and into the teens for the high desert.

It looks like Thursday will be the coldest morning for the extended forecast, however, Friday and Saturday will be quite cold as well.

In fact, there is another short wave that will move through the area on Saturday. This wave of energy could give us another shot at moisture, but the inside slider track of the system means low rainfall (if any).

Flurries could go down to 2,500 feet. Temperatures will remain below average until the middle of next week.

Basin - low 60s

Beaches -low 60s

Valleys - upper 50s

Mountains - low 30s

Deserts - upper 40s