Inside NOAA During Trump’s Sharpie Mapmaking Period

Remember the nuttery surrounding President Trump, his erroneous warning that Hurricane Dorian would hit Alabama, and his Sharpie-adjusted hurricane map? That was two whole months ago. It all put NOAA and the National Weather Service in an awkward spot. Mother Jones put in a Freedom of Information Act request for their internal emails and found out just how uncomfortable things were inside NOAA during that period.

Previously: Trump, Maps and Manipulation; ‘A Defilement of a Sacred Trust’.

Debunking a Fake Hurricane Map

Also from last week: someone on Facebook circulated a map showing the path of Hurricane Irma hitting Houston, prompting the National Weather Service to issue a warning on Twitter about fake forecasts (real forecasts only go out five days). Media factchecking service PolitiFact has the details. Fun fact: making a counterfeit or false weather forecast is an offense in the United States.

Mayfly Hatch Shows Up on Radar

When mayflies “hatch”—that is to say, moult into their final, adult “imago” form—they emerge in truly enormous numbers. Numerous enough to turn up on the National Weather Service’s radar earlier this month. [CBC News]