Referencing archived hurricane advisories, the NOAA statement said that information provided to the president and the public between Aug. 28 and Sept. 2 “demonstrated that tropical-storm-force winds from Hurricane Dorian could impact Alabama."
In an unusual move, the statement also admonished its National Weather Service office in Birmingham, Ala., which had released a tweet contradicting Trump’s claim and stating, “Alabama will NOT see any impacts from #Dorian.”
The NOAA statement said: “The Birmingham National Weather Service’s Sunday morning tweet spoke in absolute terms that were inconsistent with probabilities from the best forecast products available at the time."
Released six days after Trump’s first tweet on the matter, the NOAA statement was unsigned, neither from the acting head of the agency nor any particular spokesman. It also came a day after the president’s homeland security and counterterrorism adviser released a statement justifying Trump’s claims of the Alabama threat.
The NOAA statement Friday makes no reference to the fact that when Trump tweeted that Alabama was at risk, it was not in the National Hurricane Center’s “cone of uncertainty,” which is where forecasters determine the storm is most likely to track. Alabama also had not appeared in the cone in days earlier, and no Hurricane Center text product other than a few wind speed probability figures ever mentioned the state.
Trump’s tweet that Alabama would be affected by the storm gained national attention Wednesday when he presented a modified version of the forecast cone from Aug. 29, extended into Alabama — hand-drawn using a Sharpie. The crudely altered map appeared to represent an effort to retroactively justify the original Alabama tweet.
The doctored map went viral, becoming a source of ridicule among political pundits and late-night talk show hosts, who accused the president of dishonesty.
Altering official government weather forecasts is actually illegal. Per 18 U.S. Code 2074, which addresses false weather reports: “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 Weather Service is the modern version of the Weather Bureau.)
The map indicated only a 5 percent to 20 percent chance of such conditions in parts of Alabama beginning Monday. However, by the time of Trump’s tweet Sept. 1, those odds were down to a 5 percent chance of tropical storm conditions in a sliver of extreme southeastern Alabama.
Ten days ago, computer model predictions did present a scenario in which Dorian would strike Florida, enter the Gulf of Mexico and potentially affect Alabama. However, by Aug. 29, when the president was briefed by acting NOAA administrator Neil Jacobs, that scenario had become highly unlikely. By Sunday morning, when Trump tweeted about the Alabama threat, no credible computer model showed any risk to the state.
The Weather Service’s mission is to protect life and property. By releasing the statement admonishing the agency for an accurate forecast, NOAA may be seen as putting politics before facts. This could undermine forecasters’ ability to carry out their mission to the point where people may come to see its weather forecasts as political and untrustworthy.
Many meteorologists, recognizing Alabama was at no risk, expressed their ire on Twitter, stating Trump should have instead focused on communicating Dorian’s hazards to the Southeast coast and dispensed with his preoccupation with Alabama.
James Franklin, the former chief of a prediction unit at the National Hurricane Center, expressed support for the Birmingham Weather Service office that NOAA admonished.
“I thought Birmingham’s statement Sunday morning that Alabama would see no impacts from Dorian was spot-on and an appropriate response to the President’s misleading tweet that morning,” he wrote in an email. The Hurricane Center’s "wind-speed-probability product serves as guidance to forecasters, and it showed only a very small likelihood of tropical-storm-force winds in the state, and essentially zero chance of hurricane-force winds.”
He stated: “I am very surprised that NOAA’s statement today seems to not recognize the value its forecasters add every day to NWS products and services.”
Editor’s Note: This story has been updated to clarify that a few wind speed probability text products did include Alabama on them for a short period of time.