A cold storm will approach the area on Friday, bringing rain. The storm will feature a number of different frontal zones, each having their own intensity and impact time.
The one I want to concentrate on the most is the one later Friday evening, into half of the night. When this front passes the area, snow levels at the center of the front will be around 3500' - 4000'. This is above the pass level and snow is not expected with the bulk of the frontal zone.
The post-frontal zone activity will be what may bring the snow to 2500', which is in the Banning Pass on Friday night. Gusty west winds pushing moisture into the pass will combine with a 1000-500mb thickness of 531, which is indicating the snow development possibility.
Should this continue, I'll issue a Winter Weather Advisory for the area on the Southern California Weather Authority Website. Till then ... this post will serve as the outlook.
I can be followed at SCWXA Facebook ...