1900–1975
○ Natural causes
The meteorologist whose forecast shaped an invasion
On the night of 4 June 1944, Stagg forecast a brief improvement lasting into the dawn of 6 June.
James Stagg was a Scottish meteorologist of the British Met Office who became the senior weather adviser at Allied Supreme Headquarters during the Second World War. He combined ship observations, reconnaissance reports and intelligence with the work of British and American forecasting teams, connecting meteorology to operational command. On 4 June 1944 he identified a brief improvement after the storm, making 6 June appear viable for the Normandy landings and defining an acceptable risk rather than waiting for ideal weather. He returned to the Met Office after the war and published Forecast for Overlord in 1971.
Activities and affiliations
Career Timeline
- 1921Earned an honours MA at the University of Edinburgh
- 1924Assistant, British Meteorological Office
- 1932–1933Led the British Arctic Canada Expedition
- 1939Superintendent of Kew Observatory
- 1943–1945Chief Meteorological Officer, SHAEF for Operation Overlord
- 1944Group Captain, Royal Air Force Volunteer Reserve
- 1945–1960Returned to the Met Office, serving as Director of Services until 1960
- 1971Published Forecast for Overlord
Related historical events
Arctic Expedition and Geomagnetic Research, 1924-1939
Stagg was born in Musselburgh, Scotland, educated at Dalkeith High School and Broughton Junior Student Centre in Edinburgh, and after graduating with an MA from the University of Edinburgh in 1921 worked as a science master at George Heriot's School in Edinburgh. His career began in observation and research rather than military forecasting: in 1924 he became an assistant in the British Meteorological Office. In the winter of 1932/33 he led the British Polar Expedition of Arctic Canada, which sought direct data from high latitudes where observing stations were sparse. Drawing on this expedition and on papers concerning terrestrial magnetism, he received a Doctor of Science degree from the University of Edinburgh in 1936, and in the 1937 Coronation Honours he was appointed OBE for his work as a senior technical officer with the Air Ministry's Meteorological Office. In 1939 he was appointed superintendent of Kew Observatory. This pre-war record, particularly geomagnetic observation and polar expedition experience, underpinned the professional authority he later exercised as a civilian meteorologist inside a military command. His emergency commission as a group captain in the RAF Volunteer Reserve on 6 November 1943 served the same end, lending him standing in a military milieu unused to outsiders.