On February 9, 1870, President Ulysses S. Grant picked up his pen and signed a law creating a brand-new agency to keep an eye on America's wild weather. Before that, sailors and farmers basically guessed at storms by sniffing the air, checking the clouds, and listening to old folks' aching knees. Ships sank in surprise hurricanes. Cities flooded with no warning. Congress finally said enough.
The new service, soon called the U.S. Weather Bureau, started inside the Army Signal Corps, the team that ran military telegraphs. Soldiers at 24 stations across the country recorded the temperature, wind, and clouds three times a day, then tapped the information by telegraph to Washington, D.C. The very first official forecast was issued on November 1, 1870. From there, daily weather maps were drawn by hand and rushed to newspapers, where regular Americans could finally see what storm was barreling toward them.
Over the next 150 years, the Weather Bureau grew up. It moved out of the army, picked up new gadgets like radar, weather balloons, and satellites, and became today's National Weather Service. Now computers crunch trillions of numbers to predict tomorrow's storms, and your phone buzzes with tornado warnings minutes before the sky turns green. All of that started with one law signed in 1870, a few soldiers with thermometers, and the simple idea that a country shouldn't have to be surprised by its own sky.
