![\"GOES-17](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/04\/210425_goes17_cimssNaturalColorRGB_AK_anim.gif\")
<\/a>GOES-17 CIMSS Natural Color RGB images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-17 (GOES-West)<\/em> CIMSS Natural Color RGB images (above)<\/strong> <\/em>depicted a large offshore surge of airborne glacial silt from Southeast Alaska on 25 April 2021. During the preceding week, abnormally warm and dry conditions across much of Southeast Alaska (Juneau<\/strong><\/a> | Ketchikan<\/strong><\/a> | Sitka<\/strong><\/a> | Yakutat<\/strong><\/a>) promoted significant snow melt which exposed a great deal of surface glacial silt.<\/p>\n The leading edge of the aerosol could also be seen in GOES-17 Near-Infrared “Cirrus” (1.37 \u00b5m) images (below)<\/strong><\/em>. The presence of a very dry air mass over the region (rawinsonde data: Yakutat<\/strong><\/a> | Annette Island<\/strong><\/a>) allowed some of the lower-tropospheric aerosol to be sensed by this spectral band.<\/p>\n GOES-17 Near-Infrared “Cirrus” (1.37 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-17 True Color RGB images created using Geo2Grid<\/strong><\/a>\u00a0(below)<\/strong><\/em> provided a clearer view of the areal coverage of glacial silt moving westward off the coast.<\/p>\n GOES-17 True Color RGB images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>With ample illumination from the Moon (which was in the Waxing Gibbous phase, at 96% of Full),\u00a0 the emergence of airborne particles off the Southeast Alaska coast was seen in a Suomi NPP VIIRS Day\/Night Band (0.7 \u00b5m) image at 1221 UTC (below).<\/strong><\/em><\/p>\n<\/a><\/a>