![\"GOES-16](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2020\/11\/201102_goes16_infrared_glmFlashExtentDensity_visible_Hurricane_Eta_anim.gif\")
<\/a>GOES-16 \u201cClean\u201d Infrared Window (10.35 \u00b5m)<\/em> images (with and without an overlay of GLM Flash Extent Density) and \u201cRed\u201d Visible (0.64 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>1-minute\u00a0Mesoscale Domain Sector<\/strong><\/a>\u00a0GOES-16\u00a0(GOES-East)<\/em>\u00a0\u201cClean\u201d Infrared Window (10.35 \u00b5m<\/strong><\/a>), GLM<\/strong><\/a>\u00a0Flash Extent Density<\/strong><\/a> and \u201cRed\u201d Visible (0.64 \u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> showed Hurricane Eta<\/strong><\/a> as it was rapidly intensifying from a Category 2 to a Category 4 storm on 02 November 2020. For a few hours there was notable lightning activity within the inner eyewall of Eta.<\/p>\n GOES-16 Longwave Infrared (11.2 \u00b5m) images, with contours of 02 UTC\u00a0deep-layer wind shear<\/strong><\/a> from the CIMSS Tropical Cyclones<\/strong><\/a> site\u00a0(below)<\/strong> <\/em>showed that the hurricane was moving through an environment of low shear, which favored intensification.<\/p>\n GOES-16 Longwave Infrared (11.2 \u00b5m)<\/em> images, with contours of 02 UTC deep-layer wind shear [click to enlarge]<\/p><\/div>GOES-16 Infrared – Water Vapor Brightness Temperature Difference images (below)<\/strong> <\/em>indicated that cloud tops within much of the central dense overcast surrounding the eye were likely above the local tropopause.<\/p>\n GOES-16 Infrared – Water Vapor Difference images [click to enlarge]<\/p><\/div>\n ===== 03 November Update =====<\/strong><\/p>\n NOAA-20 VIIRS Day\/Night Band (0.7 \u00b5m)<\/em> and Infrared Window (11.45 \u00b5m)<\/em> images (credit: William Straka, CIMSS) [click to enlarge]<\/p><\/div>A toggle between NOAA-20 VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images (above)<\/strong> <\/em>displayed Eta at 0729 UTC. Illumination from the Moon — in the Waning Gibbous phase, at 93% of Full — provided a distinct visible image at night.<\/p>\n Eta made landfall along the Caribbean coast of Nicaragua as a Category 4 hurricane around 2100 UTC<\/strong><\/a>;1-minute GOES-16 Infrared and Visible images during the period 1000-2100 UTC (below)<\/strong><\/em> showed that the overall appearance of Eta had deteriorated somewhat compared to the previous day, with warming cloud-top infrared brightness temperatures and a cloud-filled eye. There was no GOES-16 GLM-detected lightning activity<\/strong><\/a> during those 11 hours leading up to landfall.<\/p>\n<\/a><\/a><\/a>