It looks like a today will be another day with absolutely no 10m WSPR spots from the USA. As previously when the 10m propagation was "poor" I still seem to be copied (using my 500mW WSPR beacon) by active stations who are a single F2 hop away. It seems the E-W path to the USA suffers when propagation is poor.
UPDATE 1944z: No USA spots all day. Will go QRT on 10m WSPR soon.