The only WA logging I can recall was from KRKO 1380 one MM at 4:00. And THAT took maybe a dozen stations to be off the air. 1380 was actually a pretty proliferate frequency for us NYCers, even with two time sharing local stations (WBNX and WAWZ).
I remember getting KRKO-1380 on the Connecticut shore... it was the easiest Washington to get on the East Coast. It was great the way 1380 emptied out on a Monday morning. Also logged from CT was KGA-1510. And one station that doesn' t even exist anymore... KHOK-1560 Hoquiam, WA, 1kw with a 1965 test broadcast.