![\"GOES-16](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/01\/210113_goes16_nighttimeMicrophysicsRGB_nightFogBTD_cloudThickness_SC_NC_VA_freezing_fog_anim.gif\")
<\/a>GOES-16 Nighttime Microphysics RGB, Night Fog BTD (10.3-3.9 \u00b5m)<\/em> and Cloud Thickness product [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-16 (GOES-East)<\/em> Nighttime Microphysics RGB<\/strong><\/a>, Night Fog BTD (10.3-3.9 \u00b5m)<\/strong><\/a> and Cloud Thickness<\/strong><\/a> product (above)<\/strong> <\/em>showed an arc of relatively thin fog across northern South Carolina, eastern North Carolina and southeastern Virginia — which was becoming thicker\/deeper in time during the hours leading up to sunrise on 13 January 2021<\/strong><\/a>. In areas where the Cloud Thickness increased to 400 meters or more (lighter shades of cyan<\/em>),<\/em> freezing fog was observed at nearby METAR sites.<\/p>\n GOES-16 Nighttime Microphysics RGB images with plots of surface observations (below)<\/strong><\/em> indicated that air temperatures were near or just below freezing at most sites across the region.<\/p>\n GOES-16 Nighttime Microphysics RGB images, with plots of surface observations [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>The band of fog over eastern North Carolina and southeastern Virginia was being pushed eastward by a lower-tropospheric trough, as shown by the NAM40 model 925 hPa wind field at 12 UTC (below)<\/strong><\/em>.<\/p>\n GOES-16 Nighttime Microphysics RGB image, with a plot of NAM40 model 925 hPa winds at 12 UTC [click to enlarge]<\/p><\/div>After sunrise, GOES-16 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) images (below)<\/strong><\/em> showed that most of the fog quickly dissipated across southeastern Virginia and eastern North Carolina, while thicker fog persisted over much of South Carolina.<\/p>\n<\/a><\/a>