As of the latest look at the track of Hurricane Matthew, provided by forecasters with NOAA's National Hurricane Center at 5 p.m.
If this jet streak maintains its position and strength, Matthew will be pulled into that strong flow, and will get caught up in the clockwise rotation of winds just to the south of the jet streak.
If that jet streak breaks down, or the entrance to the jet streak stays just out of reach of Matthew, the storm could bypass this rotating flow and proceed up the east coast.
If the storms get close enough, around 1,400 kilometres apart, this sets up a swirling pattern between them, as shown in the example below: Satellite views of Severe Tropical Storm Parma and Typhoon Melor, from October 6, 2009.
If they do get caught up in the Fujiwhara effect, since it's the relative size of the storms that dictates which will lead, that certainly favours Matthew as the dominant partner in any upcoming dance between these two, at least at the moment.