Professor John Alan Chalmers (29 September 1904 – 14 March 1967) was a British atmospheric physicist based at Durham University.
He is well known for his contributions to atmospheric electricity, particularly an internationally-respected textbook, and, outside his scientific work, for his involvement with Scouting.
This led to him being widely known to his colleagues by the nickname, "Skip", a commonly used term for the leader of a Scout troop.