By September 5, 1900, a hurricane that had crossed Cuba was moving into the Florida Straits, and meteorologists at Havana's Belén Observatory, the hurricane-forecasting institution built by the Jesuit priest Benito Viñes, had already read its track correctly: the storm was curving northwest into the Gulf of Mexico, toward the Texas coast. That reading never went out over the telegraph. Since the Spanish-American War, the United States Weather Bureau had decreed that only its own forecasts, not the observatory's, would be carried over the telegraph out of Havana. Washington's own forecasters read the same storm differently, expecting it to recurve northeast and blow itself out somewhere off Florida. On September 5 they warned shipping from Cedar Key to Miami; the next day they extended a hurricane warning up the Atlantic coast to Savannah. Galveston heard nothing.
The storm did not recurve. By September 7, with its Florida forecast already failing to pan out, the Bureau extended a storm warning to Galveston, and Isaac Cline, the Bureau's own local forecaster, raised the flags that morning. It was one day's notice, issued only once Washington's own forecast had come apart, not the longer notice Havana's correct reading could have given had it been allowed onto the wire. By that afternoon a heavy swell was rolling in from the southeast; it continued through the night, and by morning on the 8th the tide was already over the streets of low Galveston. At 3:30 p.m. that day, with the water still rising, Cline sent Washington a telegram describing what he could see: Gulf rising, water covers streets of about half of city. It was the last message to leave the city before the wires went down.
By nightfall, wind Cline himself estimated at least 120 miles an hour and a storm surge over fifteen feet had erased most of Galveston. Cline's own house collapsed with fifty people sheltering inside it; his wife was among those who did not survive. His official report to Washington, written within the month, put the toll at "the appalling figure, 6,000" — a count the report itself called conservative. Later estimates run as high as 12,000. It remains the deadliest natural disaster in United States history.
The correct forecast already existed three days before the storm reached Texas, built on decades of careful observation. It was not unavailable. It was excluded, by an institution that controlled which forecasts the telegraph carried to the people who needed it. A wrong forecast broadcast with the Bureau's full authority beat a right one kept off the line, and the Texas coast made its decisions on whichever one it was permitted to hear.
A forecast is only as useful as the channel that carries it, and in 1900 one institution decided what the telegraph carried. An accurate reading of the storm existed three days before it reached Texas. It never reached the city that needed it.