There are two large storms coming off the Pacific Ocean

https://www.ksbw.com/weather/radar

If you click on the above and open it up enough you will be able to see this if you click on  radar/Satellite if you open up the Layers section to your right.

Both Storms are coming from the general region of Hawaii, one from just above Hawaiian Islands and one from below the Hawaiian islands. One is hitting from Guadalahara to San Diego from South of Hawaii and one is coming from north of Hawaii and is hitting mostly from Vancouver, Canada to Seattle and Portland and then coming east and south as far south as Mt. Shasta for now. These are both very large storms with seeds all the way back to above and below the Hawaiian Islands by the way. It's presently 30 Degrees at almost midnight Monday night and going down as low as 8 degrees in Mt. Shasta by Wednesday night. So, if you are hitch hiking you might die by freezing to death or get serious frostbite on fingers or toes or nose or ears if you don't get a ride in that area so be careful this Thanksgiving week traveling on Interstate 5 especially from Redding to Ashland, Oregon going north or south.