ZIZ 555 kHz and WRKO 680 kHz

Some mediumwave loggings to finish up the day's reports. All logged in Harrowsmith, Ontario on the Kaito KA-1103 with its built-in ferrite bar antenna:

• ZIZ (tentative), 555 kHz, St. Kitts and Nevis, at 0441-0508 UTC in English with poor signal. BBC programming. No ID heard, so identification is tentative, but there's not much doubt about it. ZIZ is the only station in the Americas that operates on 555 kHz, and it does carry BBC programming overnight. This is a relog but it has been many years since I last heard ZIZ. It's impossible to hear at my location in Toronto because of the noise level, and because of semi-local WGR on 550.
• WNNZ, 640 kHz, Westfield, MA, USA, at 1325-1333 UTC with fair signal. New England Public Radio. Relog.
• WRKO, 680 kHz, Boston, MA, USA at 1335-1337 UTC with fair to poor signal. Talk about U.S. presidential race. New to overall log. 680 is blocked in Toronto because of local CFTR, and even in Kingston CFTR is normally dominant. But this morning WRKO was beating it down..