NOAA Operational Significant Even Imagery
This page features satellite images of smoke, hurricanes & typhoons, all manner of natural hazards. There are images of the Southern California fires smoke.
MODIS Rapid Response System
Follow the Gallery link to pages of images from the MODIS instrument. These are the best quality satellite images you will see of anything, including smoke from the SoCal fires. Amazing tropical storm images.
National Weather Service: Los Angeles Oxnard
This is the NWS page with forecasts, satellite images and current weather for the L.A. & So Cal areas. Follow the satellite link. The 1-km LA area images are updated every 15 minutes or so, and do show the smoke plumes well. Evening & morning images, with low sun angle, show up the smoke best. Full disk images show that the smoke has spread wide over the Pacific Ocean off North America.