On the first episode of Atmosphere, meteorologist Emily Gracey digs into the science and human drama behind PRESSURE, the new film about the real weather forecasters who had to find a window for the Allied invasion of Normandy. No satellites. No radar. Everything on the line.

Weather historian Sean Potter breaks down what the atmosphere was actually doing that week, the fractured forecasting teams, and why Captain James Stagg's call remains one of the most consequential in the history of meteorology.

Then director Anthony Maras, who brought the same unflinching, ground-level storytelling to Hotel Mumbai, joins to talk about how he turned this forecast into a film, and why getting the science right meant bringing real meteorologists into the room.

Because sometimes the most powerful force in the room isn't a weapon. It's a weather map.