Donald Trump has caused uproar on social media after displaying a map of Hurricane Dorian's path featuring an extra loop drawn in Sharpie extending it to Alabama – in an apparent attempt to validate previous baseless claims the state could be affected.

Over the weekend, as Dorian struck the Bahamas, the president issued a torrent of tweets. One mistakenly warned that Alabama would also be impacted.

Just 20 minutes later, the National Weather Service in Birmingham, Alabama, tweeted: "Alabama will NOT see any impacts from #Dorian. We repeat, no impacts from Hurricane #Dorian will be felt across Alabama. The system will remain too far east.”