![Uncredited This undated family handout photo shows Maureen Sweeney. Sweeney was a postal clerk at Blacksod Point on the northwest coast of Ireland, where one of her duties was to record data that fed into weather forecasts for the British Isles. In early June 1944, Sweeney sent a series of readings that helped persuade Gen. Dwight D. Eisenhower, the supreme commander of Allied forces in Europe, to delay D-Day and avoid potentially disastrous weather that could have wrecked the landings. She didn’t learn of her role in history for more than 10 years. (Family Handout via AP)](https://mapi.associatedpress.com/v2/items/5cf57e7006e648c0a44185cdd0c49ff5/preview/preview.jpg?s=680x)
This undated family handout photo shows Maureen Sweeney. Sweeney was a postal clerk at Blacksod Point on the northwest coast of Ireland, where one of her duties was to record data that fed into weather forecasts for the British Isles. In early June 1944, Sweeney sent a series of readings that helped persuade Gen. Dwight D. Eisenhower, the supreme commander of Allied forces in Europe, to delay D-Day and avoid potentially disastrous weather that could have wrecked the landings. She didn’t learn of her role in history for more than 10 years. (Family Handout via AP)
![Fergus Sweeney This image taken from family video in June 2015, shows Maureen Sweeney. Sweeney was a postal clerk at Blacksod Point on the northwest coast of Ireland, where one of her duties was to record data that fed into weather forecasts for the British Isles. In early June 1944, Sweeney sent a series of readings that helped persuade Gen. Dwight D. Eisenhower, the supreme commander of Allied forces in Europe, to delay D-Day and avoid potentially disastrous weather that could have wrecked the landings. She didn’t learn of her role in history for more than 10 years. (Fergus Sweeney/Family Handout via AP)](https://mapi.associatedpress.com/v2/items/d4ba97c170ab460c925993873d13b280/preview/preview.jpg?s=680x)
This image taken from family video in June 2015, shows Maureen Sweeney. Sweeney was a postal clerk at Blacksod Point on the northwest coast of Ireland, where one of her duties was to record data that fed into weather forecasts for the British Isles. In early June 1944, Sweeney sent a series of readings that helped persuade Gen. Dwight D. Eisenhower, the supreme commander of Allied forces in Europe, to delay D-Day and avoid potentially disastrous weather that could have wrecked the landings. She didn’t learn of her role in history for more than 10 years. (Fergus Sweeney/Family Handout via AP)