A similar comparison of 4-km resolution GOES-15 and GOES-13 3.9 Âµm shortwave IR images (below; click image to play animation) confirmed that the plume streaming southward from the Amarillo area was indeed glaciated — the plume appeared significantly colder (brighter white) compared to the surrounding supercooled water droplet stratus cloud deck, which appeared warmer (darker gray) due to the shortwave IR channel’s sensitivity to the reflection of solar radiation off the liquid droplet cloud tops.A comparison of AWIPS images of 1-km resolution Terra MODIS 0.65 Âµm visible channel, 3.7 Âµm shortwave IR channel, and 11.0 Âµm IR window channel images (below) provided a slightly sharper view than the GOES images. Again, the glaciated plume south of Amarillo appeared colder (brighter white) than the surrounding supercooled water droplet clouds; on the IR window channel image, the slightly warmer (darker gray) signature was due to the satellite sensing radiation from the warmer ground surface through the thinner glaciated areas of the cloud plume.
A 250-meter resolution Terrra MODIS true-color Red/Green/Blue (RGB) image from the SSEC MODIS Today site (below; visualized using Google Earth) showed that the plume was drifting southward over parts of Interstate 27; one inch of snowfall was reported as far south as Happy, in the far northern part of Swisher county.
===== 11 February Update =====
On the folllowing day, a Terra MODIS true-color image at 17:44 UTC (below; visualized using Google Earth) provided a fantastic view of the mesoscale patch of snow cover southwest of Borger, Texas.