ByMark Willard•

3 hours ago

Updated: May 27, 2026, 1:02 pm EDTPublished: May 27, 2026, 8:00 am EDT

Explore the extraordinary D-Day weather forecast that helped determine the timing of the Normandy invasion during World War II. Watch archival footage and interviews with the cast and crew of "Pressure" to see how 1940s meteorologists used weather balloons, ship observations and hand-drawn maps to predict a narrow weather window for June 6, 1944, decades before satellites, radar and modern forecasting technology.