On Sunday, President Donald Trump said Hurricane Dorian could hit Alabama, but the National Weather Service said that was false.

Trump refused to retract his claim, tweeting, incorrectly, that "under certain original scenarios, it was in fact correct that Alabama could have received some 'hurt.'"

In a live video update about Hurricane Dorian on Wednesday, Trump used a forecast graphic from last Thursday that had been altered with a black line to extend the storm's cone into Alabama.

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On Sunday, President Donald Trump warned on Twitter that Hurricane Dorian could hit Alabama. The National Weather Service, however, said unambiguously that Alabama was not in the storm's path.

On Wednesday, during a 50-second live Twitter update about the hurricane, Trump held up an outdated National Hurricane Center forecast of Dorian's path. The graphic, which was published last Thursday, had been altered: A semicircle of black ink extended the farthest reaches of Hurricane Dorian's impact cone beyond Florida and into Alabama.

"Our original chart was that it was going to be hitting Florida directly," Trump said, adding, "It was going to be hitting directly, and that would've affected a lot of other states."

—The White House (@WhiteHouse) September 4, 2019

The real NHC forecast did not involve Alabama

On Sunday, Trump tweeted: "In addition to Florida - South Carolina, North Carolina, Georgia, and Alabama, will most likely be hit (much) harder than anticipated."

The NWS's office in Birmingham responded 20 minutes later: "Alabama will NOT see any impacts from #Dorian. We repeat, no impacts from Hurricane #Dorian will be felt across Alabama. The system will remain too far east."

The graphic below is the original, unaltered version of the forecast that Trump referred to in his Twitter video on Wednesday.

In it, the farthest reaches of the hurricane's cone — the NHC graphics depict the potential path of the storm for up to five days — did not extend into Alabama.

Despite the NWS's correction, Trump continued to claim on Sunday that Alabama could get hit. He said it once to reporters on the South Lawn of the White House and later at a meeting with officials from the Federal Emergency Management Agency.

He tweeted on Monday that "under certain original scenarios, it was in fact correct that Alabama could have received some 'hurt.'"

Read more: Trump refused to back down from his claim that Hurricane Dorian could hit Alabama, even after the National Weather Service said it was false

Falsifying weather data is illegal

US law — specifically, Title 18, Section 2074 of the US Code — says that:

"Whoever knowingly issues or publishes any counterfeit weather forecast or warning of weather conditions falsely representing such forecast or warning to have been issued or published by the Weather Bureau, United States Signal Service, or other branch of the Government service, shall be fined under this title or imprisoned not more than ninety days, or both."

The NHC is the division of the National Weather Service responsible for tracking and predicting tropical weather systems, so its warnings get that legal protection.