That tweet which had an image showing bands of latitude that it may hit and times (london/newyork ish tomorrow and day after) has been deleted by the author and now says "I would like to make an apology to the small body community. Some information was shared with me on an internal company message board that I did not have full perspective on and I posted a tweet, which I now understand was not appropriate. It was preliminary data and I did not have full perspective on it."
I don't feel very reassured.