In the end we decided that we would risk it and headed off into the snow we had packed a spad and some blankets just in case we got stuck but as it turned out the heavy snow was very local and although there was some light snow it wasn't settling. In the end we got to synagogue rather early (which is just a danger of living at a distance). The room where we had the Tu B'Shavet meal was lovely with one big table and the walls decorated with pictures of trees. I am not sure that any of the more mystical elements of the evening came though, but it was a fun event nevertheless.