From telegraph signals to space weather, how the U.S. monitors the atmosphere and beyond.

Nature · Published 3 October 2026 Swipe more like this →

In short: The National Weather Service has evolved from a 19th-century military telegraph project into a complex civilian agency. Today, it manages everything from local flash flood warnings to solar flare monitoring, providing essential data that keeps aviation, emergency management, and the public informed about the volatile state of our planet.

The origins of the National Weather Service trace back to 1870, when President Ulysses S. Grant signed a joint resolution creating the first official U.S. weather service. Initially placed under the Department of War, the agency relied on military discipline to ensure the prompt collection of meteorological observations via telegraph. By 1891, it transitioned into a civilian enterprise under the Department of Agriculture, eventually moving to the Department of Commerce in 1940. It adopted its current name in 1970 upon the formation of the National Oceanic and Atmospheric Administration.

Today, the agency operates through a vast network of 122 local Weather Forecast Offices, supported by specialized national centers. These offices issue critical alerts for severe weather, including tornadoes and floods, while also providing tailored support for aviation and wildfire management. For instance, Incident Meteorologists are deployed directly to wildfire sites, bringing mobile weather centers to provide real-time support in remote, hazardous conditions. The agency’s reach even extends to space, with the Space Weather Prediction Center in Boulder, Colorado, monitoring solar activity that can disrupt GPS, radio, and power grids.

The dissemination of this information has shifted from traditional text forecasts to sophisticated digital formats. Through the National Digital Forecast Database, users can access gridded data for complex modeling. Despite its technological advancements, the agency has faced significant institutional challenges. In 2025, the service underwent substantial staff layoffs and contract cancellations. Furthermore, an executive order in August 2025 reclassified the agency’s primary function as national security work, citing the critical role weather data plays in planning military deployments, a move that also dissolved the NWS Employee Union.

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