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Wednesday, February 1, 2023
Home At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP’s Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma’s eye and tropospheric gravity waves were present around the well-defined eyewall. (NOAA/NASA/UWM-CIMSS, William Straka III) At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP's Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma's eye and tropospheric gravity waves were present around the well-defined eyewall. (NOAA/NASA/UWM-CIMSS, William Straka III)

At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP’s Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma’s eye and tropospheric gravity waves were present around the well-defined eyewall. (NOAA/NASA/UWM-CIMSS, William Straka III)

At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP's Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma's eye and tropospheric gravity waves were present around the well-defined eyewall. (NOAA/NASA/UWM-CIMSS, William Straka III)

At 2:57 a.m. AST/EDT on Sept. 7, Suomi NPP’s Day Night Band imagery and the waning gibbous moon highlighted the convection around Irma’s eye and tropospheric gravity waves were present around the well-defined eyewall. (NOAA/NASA/UWM-CIMSS, William Straka III)

NASA’s Aqua satellite captured infrared temperature data on Hurricane Irma on Sept. 7 at 1:47 a.m. EDT (0547 UTC). The image showed a clear eye and very cold cloud top temperatures as cold as minus 63 degrees Fahrenheit (minus 53 degrees Celsius). The southwestern quadrant of the storm was over Puerto Rico. (NASA JPL/Ed Olsen)
At 2:57 a.m. AST/EDT on Sept. 7, Infrared imagery from Suomi NPP revealed cloud top temperatures as cold as (white) 190 kelvin (minus 83.1 degrees Celsius/minus 117.7 degrees Fahrenheit) from Irma’s northern quadrant, stretching through the eastern side to the south of the eye. (NOAA/NASA/UWM-CIMSS, William Straka III)