Observance Daily What day is today, and why are we celebrating it?
On November 1, 1870, the US Weather Bureau — established earlier that year within the Army Signal Service — made its first official meteorological forecast, the start of organised public weather forecasting in the United States. For the first time, a government office was gathering weather reports from across the country, analysing them in one place, and telling the public what the weather would do next.
What happened at the US Weather Bureau in 1870
The idea was practical rather than scientific curiosity. By collecting simultaneous weather observations telegraphed in from stations across the country, a central office could track storms as they moved and warn people in their path — particularly on the Great Lakes and along the coasts, where sudden storms sank ships and drowned sailors with grim regularity. Early forecasts were brief and general by modern standards, little more than a sentence or two about the coming day, but the system they began — nationwide observation, central analysis and a public forecast — is the direct ancestor of today’s National Weather Service, which was renamed and moved to civilian control in the 20th century.
The telegraph was the technology that made it possible. Before the telegraph, nobody could know the weather anywhere but where they stood; by 1870, readings of temperature, wind and barometric pressure could be sent from distant stations and arrive in Washington within minutes. For the first time, the weather could be watched as a moving system — a storm over the Lakes in the morning could be warned about on the Atlantic coast by evening. The US Weather Bureau was built on exactly that insight.
Why the Great Lakes came first
The Great Lakes were the weather service’s first proving ground, and the reason is written in shipwrecks. The Lakes carry an enormous volume of shipping, and their storms arrive with shocking speed — calm water turning to mountainous seas in an hour. Congress had watched years of disasters before deciding that storm warnings were a job for the federal government. The first forecasts were aimed squarely at the mariners of the Lakes and the coasts: a few words, telegraphed to harbours and ports, telling captains to stay in or brace themselves. It was a humble beginning for an agency that would one day track hurricanes from space.
Why the US Weather Bureau’s first forecast matters
It is hard now to imagine a world without the weather forecast — the morning ritual of checking whether to carry an umbrella, the hurricane warnings that empty coastlines, the severe-storm alerts that buzz every phone in a county. All of that descends from the first official forecast of November 1, 1870. The Bureau proved that weather could be treated as public information: collected at public expense, analysed centrally, and given away free to everyone from sea captains to farmers planning a harvest. That principle — that the sky belongs to everyone — still underpins every forecast issued in the United States today.
The forecast also marked a quiet revolution in how people related to the weather. Before 1870, the weather was something that happened to you, a matter of proverbs and aching joints. After 1870, it became something you could be told about in advance — the first small step toward the modern expectation that the future, even the atmospheric future, can be modelled, predicted and prepared for.
The US Weather Bureau: frequently asked questions
When was the first official US weather forecast? On November 1, 1870, from the newly established US Weather Bureau. Who ran the Bureau? It was set up within the Army Signal Service — weather forecasting began as a military job. How did the first forecasts work? Stations across the country telegraphed simultaneous observations — temperature, wind, pressure — to a central office, which tracked storms and issued warnings. Why did it start with the Great Lakes and coasts? Because sudden storms there sank ships; warnings were first aimed at mariners. What is the Weather Bureau called today? Its descendant is the National Weather Service, renamed and moved to civilian control in the 20th century.
Read more about November 1 on November 1 Holidays, Observances and History.