When the tropics and extra-tropics collide: revisited for 2019

A couple of years ago I wrote a blog post wondering how easy it might be to propel a hurricane into Europe, based on extremes of sea surface temperature and tropical cyclone forward speeds. Not long after this, Hurricane Ophelia came within 12 hours of landfall from Ireland as a tropical system. Two years on, there is the potential of another system - Lorenzo - anomalous in its intensity and location for this time of year - being accelerated towards NW Europe in the jet-stream, such that it could re-intensify, laden with tropical moisture. Although it's unlikely to still be classified as a tropical system by the time it reaches the latitudes of NW Europe, hard on the heels of Ophelia's anoma