This animation of NOAA's GOES East satellite imagery from Sept. 4 at 8:45 a.m. EDT (1245 UTC) to Sept. 7 ending at 8:45 a.m. EDT (1245 UTC) shows Category 5 Hurricane Irma move west and track just north of Puerto Rico and Hispaniola. Meanwhile, Tropical Storm Katia formed in the southwestern Gulf of Mexico. Credit: NASA-NOAA GOES Project
