See http://www.infotechcomms.net/propcharts .
Taking a peek at Steve's propagation forecasts for 10m this autumn does not look good for E-W propagation from the UK to North America. Even with a sunspot count averaging in the low 30s (possibly too high?) it looks like E-W SSB propagation with 100W is unlikely. With WSPR or JT modes much lower power is possible, but openings to the USA are likely to be much rarer than in seasons past.