@Robert ******
I have used the Thai Consulate in Portland OR for over 15 years mail in and in person, it's a 3hr drive from Seattle. Original plan was to come in on the old passport then renew at the US embassy BKK then transfer the 1 year over until Dec 23 then renew it for another year . However I have a bit more time in Seattle in Oct to get a new passport and the dip below 400 k for a while I cant renew it even tho it will be back over 800k 2 months before Dec 23 2019