Unregistered Vehicles: Moving from California to Washington when Registration is Past Due

My question involves vehicle registration or title in the state of: California

I am moving from California to Washington. My California registration was due on the 28th of July, I am moving this weekend and don't want to have to pay for registration in California if I'm moving so soon. I am wondering what happens if I get pulled over on my way there? Will I get ticketed for my registration being expired or are there any options I am not thinking of?

Thank you!

Unregistered Vehicles: Moving from California to Washington when Registration is Past Due