IMERG precipitation totals from Hurricane Ian

Hurricane Ian Makes Landfall in Cuba on Route to the U.S. Gulf Coast

Hurricane Ian formed in the Caribbean Sea on Sept. 26, 2022.  Ian intensified to Category 3 hurricane on the Saffir-Simpson scale by the time it made landfall in western Cuba early the next day. NASA's near real-time IMERG algorithm was used to estimate the precipitation from Ian during its formation and intensification.


IMERG precipitation accumulations for Hurricane Ian from Sept. 24 - 27, 2022, with the extent of tropical storm-force winds shown in white circles. Credits: NASA

IMERG shows that Ian's largest rainfall accumulation so far, over 12 inches, occurred while it was only a tropical storm and not yet a hurricane. The National Hurricane Center provided an estimate of the distance that tropical storm-force winds extended from Ian's low-pressure center, as shown by the white circles.  The location of Ian's Cuban landfall at approximately 4:30am EDT (0830 UTC), Sept. 27, is marked with a white dot.


Image & text by Owen Kelley (NASA GSFC / PPS)